-75.19% is the change from 915 to 227
Calculation steps:
[( 227 - 915 ) ÷ 915] x 100 = -75.19%
Formula
Percentage change = [(227 - 915) / 915] x 100
Subtract the new number by the original number
227 - 915 = -688
-688 ÷ 915 = -0.7519125683060109
-0.7519125683060109 x 100 = -75.19%