It is currently 18 Oct 2017, 11:44

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# A substance is 99% water. Some water evaporates, leaving a

Author Message
Intern
Joined: 12 Dec 2004
Posts: 33

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

A substance is 99% water. Some water evaporates, leaving a [#permalink]

### Show Tags

03 Jan 2005, 14:03
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A substance is 99% water. Some water evaporates, leaving a substance
that is 98% water. How much of the water evaporated?

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

VP
Joined: 30 Sep 2004
Posts: 1480

Kudos [?]: 411 [0], given: 0

Location: Germany

### Show Tags

03 Jan 2005, 15:00
1. (99-x)/100 = 98/100
2. 1 = x
3. solution is 1

Kudos [?]: 411 [0], given: 0

VP
Joined: 30 Sep 2004
Posts: 1480

Kudos [?]: 411 [0], given: 0

Location: Germany

### Show Tags

03 Jan 2005, 15:06
silly mistake:

1. 99-x/100-x = 98/100
2. 9900-100x = 9800-98x
3. 100 = 2x
4. 50 = x

Kudos [?]: 411 [0], given: 0

Manager
Joined: 29 Jul 2004
Posts: 61

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

### Show Tags

03 Jan 2005, 15:45
(99-x)/(100-x)=.98

98-.98x=99-x

.02x=1

2x=100

x=50

If you double check, (99-50)/(100-50)=49/50

(49/50)*(2/2)=98/100=98%

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

Director
Joined: 07 Nov 2004
Posts: 683

Kudos [?]: 162 [0], given: 0

### Show Tags

03 Jan 2005, 18:27

Kudos [?]: 162 [0], given: 0

03 Jan 2005, 18:27
Display posts from previous: Sort by