-48.59% is the change from 177 to 91
Calculation steps:
[( 91 - 177 ) ÷ 177] x 100 = -48.59%
Formula
Percentage change = [(91 - 177) / 177] x 100
Subtract the new number by the original number
91 - 177 = -86
-86 ÷ 177 = -0.4858757062146893
-0.4858757062146893 x 100 = -48.59%