Question

to figure out how many vacation days he had left to use, eddie looked over his old calendars to figure out how many days of vacation he had taken each year. vacation days taken by eddie 2011 23 2012 21 2013 23 2014 14 2015 15 according to the table, when was the rate of decrease greater? between 2011 and 2013 between 2012 and 2015

Explanation:

Step1: Calculate rate of decrease between 2011 and 2013

There is no decrease as vacation days are same ($23 = 23$). Rate of decrease is $0$.

Step2: Calculate rate of decrease between 2012 and 2015

Initial value (2012) $a = 21$, final value (2015) $b=15$.
Rate of decrease formula: $\frac{a - b}{a}\times100\%$.
Substitute values: $\frac{21 - 15}{21}\times100\%=\frac{6}{21}\times100\%\approx 28.57\%$.

Answer:

between 2012 and 2015