-91.41% is the change from 920 to 79
Calculation steps:
[( 79 - 920 ) ÷ 920] x 100 = -91.41%
Formula
Percentage change = [(79 - 920) / 920] x 100
Subtract the new number by the original number
79 - 920 = -841
-841 ÷ 920 = -0.9141304347826087
-0.9141304347826087 x 100 = -91.41%