-76.39% is the change from 915 to 216
Calculation steps:
[( 216 - 915 ) ÷ 915] x 100 = -76.39%
Formula
Percentage change = [(216 - 915) / 915] x 100
Subtract the new number by the original number
216 - 915 = -699
-699 ÷ 915 = -0.7639344262295082
-0.7639344262295082 x 100 = -76.39%