-31.64% is the change from 177 to 121
Calculation steps:
[( 121 - 177 ) ÷ 177] x 100 = -31.64%
Formula
Percentage change = [(121 - 177) / 177] x 100
Subtract the new number by the original number
121 - 177 = -56
-56 ÷ 177 = -0.3163841807909605
-0.3163841807909605 x 100 = -31.64%