-83.5% is the change from 915 to 151
Calculation steps:
[( 151 - 915 ) ÷ 915] x 100 = -83.5%
Formula
Percentage change = [(151 - 915) / 915] x 100
Subtract the new number by the original number
151 - 915 = -764
-764 ÷ 915 = -0.8349726775956284
-0.8349726775956284 x 100 = -83.5%