-83.15% is the change from 920 to 155
Calculation steps:
[( 155 - 920 ) ÷ 920] x 100 = -83.15%
Formula
Percentage change = [(155 - 920) / 920] x 100
Subtract the new number by the original number
155 - 920 = -765
-765 ÷ 920 = -0.8315217391304348
-0.8315217391304348 x 100 = -83.15%
Example