-43.5% is the change from 177 to 100
Calculation steps:
[( 100 - 177 ) ÷ 177] x 100 = -43.5%
Formula
Percentage change = [(100 - 177) / 177] x 100
Subtract the new number by the original number
100 - 177 = -77
-77 ÷ 177 = -0.4350282485875706
-0.4350282485875706 x 100 = -43.5%