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# John spent 40% of his earning last month on rent and 30%

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Intern
Joined: 07 Mar 2013
Posts: 6
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Kudos [?]: 1 [1] , given: 0

John spent 40% of his earning last month on rent and 30% [#permalink]  14 Mar 2013, 03:04
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Question Stats:

90% (02:06) correct 10% (01:06) wrong based on 51 sessions
John spent 40 percent of his earning last month on rent and 30 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did John have left over?

(A) 30%
(B) 32%
(C) 45%
(D) 68%
(E) 70%

hey guys,
could someone solve this problem with step by step explanation, please?
[Reveal] Spoiler: OA

Last edited by Bunuel on 14 Mar 2013, 03:08, edited 1 time in total.
Edited the question and the tags.
Math Expert
Joined: 02 Sep 2009
Posts: 27468
Followers: 4311

Kudos [?]: 42214 [0], given: 5957

Re: John spent 40% of his earning last month on rent and 30% [#permalink]  14 Mar 2013, 03:11
Expert's post
musical33 wrote:
John spent 40 percent of his earning last month on rent and 30 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did John have left over?

(A) 30%
(B) 32%
(C) 45%
(D) 68%
(E) 70%

hey guys,
could someone solve this problem with step by step explanation, please?

Say John's earning last month was $100. John spent 40 percent of his earning last month on rent -->$40 on rent;
30 percent less than what he spent on rent to purchase a new dishwasher --> $40*0.7=$28 on the dishwasher.

Left over amount 100 - (40 + 28) = $32. Answer: B. Hope it's clear. _________________ Intern Joined: 07 Mar 2013 Posts: 6 Followers: 0 Kudos [?]: 1 [0], given: 0 Re: John spent 40% of his earning last month on rent and 30% [#permalink] 14 Mar 2013, 03:15 Bunuel wrote: musical33 wrote: John spent 40 percent of his earning last month on rent and 30 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did John have left over? (A) 30% (B) 32% (C) 45% (D) 68% (E) 70% hey guys, could someone solve this problem with step by step explanation, please? Say John's earning last month was$100.

John spent 40 percent of his earning last month on rent --> $40 on rent; 30 percent less than what he spent on rent to purchase a new dishwasher -->$40*0.7=$28 on the dishwasher. Left over amount 100 - (40 + 28) =$32.

Hope it's clear.

thank you Bunuel
my problem with this what is the $40*0.7=$28
what is the .7 ?
Math Expert
Joined: 02 Sep 2009
Posts: 27468
Followers: 4311

Kudos [?]: 42214 [0], given: 5957

Re: John spent 40% of his earning last month on rent and 30% [#permalink]  14 Mar 2013, 03:18
Expert's post
musical33 wrote:
Bunuel wrote:
musical33 wrote:
John spent 40 percent of his earning last month on rent and 30 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did John have left over?

(A) 30%
(B) 32%
(C) 45%
(D) 68%
(E) 70%

hey guys,
could someone solve this problem with step by step explanation, please?

Say John's earning last month was $100. John spent 40 percent of his earning last month on rent -->$40 on rent;
30 percent less than what he spent on rent to purchase a new dishwasher --> $40*0.7=$28 on the dishwasher.

Left over amount 100 - (40 + 28) = $32. Answer: B. Hope it's clear. thank you Bunuel my problem with this what is the$40*0.7=$28 what is the .7 ? 30 percent less than what he spent on rent to purchase a new dishwasher = 40 - 0.3*40 = 0.7*40. Or: 30 percent less than what he spent on rent to purchase a new dishwasher means that he spent 70% of the rent on the dishwasher. Hope it's clear. _________________ Re: John spent 40% of his earning last month on rent and 30% [#permalink] 14 Mar 2013, 03:18 Similar topics Replies Last post Similar Topics: 17 At a supermarket, John spent 1/2 of his money on fresh fruit 8 06 Aug 2012, 01:53 4 If Pat saved$600 of his earnings last month, how much did 14 30 Jul 2012, 01:23
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4 A certain farmer pays \$30 per acre per month to rent farmlan 9 26 Oct 2007, 09:18
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