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From 1940 to 1955, the percent increase in the number of televisions

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Math Expert
Joined: 02 Sep 2009
Posts: 58427
From 1940 to 1955, the percent increase in the number of televisions  [#permalink]

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24 Jan 2018, 23:31
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Difficulty:

15% (low)

Question Stats:

75% (01:15) correct 25% (01:16) wrong based on 85 sessions

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From 1940 to 1955, the percent increase in the number of televisions was closest to

A. 30
B. 130
C. 350
D. 450
E. 650

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Joined: 22 May 2016
Posts: 3575
From 1940 to 1955, the percent increase in the number of televisions  [#permalink]

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25 Jan 2018, 09:42
Bunuel wrote:

From 1940 to 1955, the percent increase in the number of televisions was closest to

A. 30
B. 130
C. 350
D. 450
E. 650

Use only the left axis of the graph.

The left and right axes have different scales. The left axis is marked off in multiples of 20. For each year, go straight up to the solid line, then left to the left axis.

In 1940, there were about 20 televisions. In 1955, there were about 90 televisions.

Percent change: $$\frac{New-Old}{Old} * 100$$

$$\frac{90-20}{20}*100=\frac{70}{20}*100=3.5*100=350$$
%

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From 1940 to 1955, the percent increase in the number of televisions   [#permalink] 25 Jan 2018, 09:42
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