-21.53% is the change from 915 to 718
Calculation steps:
[( 718 - 915 ) ÷ 915] x 100 = -21.53%
Formula
Percentage change = [(718 - 915) / 915] x 100
Subtract the new number by the original number
718 - 915 = -197
-197 ÷ 915 = -0.21530054644808744
-0.21530054644808744 x 100 = -21.53%