-50.97% is the change from 155 to 76
Calculation steps:
[( 76 - 155 ) ÷ 155] x 100 = -50.97%
Formula
Percentage change = [(76 - 155) / 155] x 100
Subtract the new number by the original number
76 - 155 = -79
-79 ÷ 155 = -0.5096774193548387
-0.5096774193548387 x 100 = -50.97%