-12.2% is the change from 82 to 72
Calculation steps:
[( 72 - 82 ) ÷ 82] x 100 = -12.2%
Formula
Percentage change = [(72 - 82) / 82] x 100
Subtract the new number by the original number
72 - 82 = -10
-10 ÷ 82 = -0.12195121951219512
-0.12195121951219512 x 100 = -12.2%