Economic-CPI question-thank you?

Question

The CPI was 140 in one year and 145.2 the following year. Approximately how much did prices rise between the two years?

3.7 percent

3.15 percent

0.03 percent

1.04 percent

none of the above

Answer 1

a) 3.7 percent

145.2/140≈1.037=+3.7%