How do I solve this question?
According to the table below, by what percentage did prices change between 2006 and 2009?
CPI Data
Year Index
2006 100
2007 110
2008 120
2009 125
2010 140

A. 10%
B. 20%
C. 25%
D. 40%
E. 80%

Question

How do I solve this question?
According to the table below, by what percentage did prices change between 2006 and 2009?
CPI Data
Year	Index
2006	100
2007	110
2008	120
2009	125
2010	140

A. 10%
B. 20%
C. 25%
D. 40%
E. 80%

solomonzelman · Answer

From 2006 to 2009 it changed from $100 to $125.
so the change was that it increased by $25.
25 is how much percent of the original price (from which it changed) ?

$$\huge\color{blue}{  100 \times \frac{25%}{100} ~~~~~~->~~~~~~25 \text{%} }$$

solomonzelman · Answer

C is your answer.

solomonzelman · Answer

Oh, 3 days ago, wasn't expecting to get a medal, just answered.