-87% is the change from 577 to 75
Calculation steps:
[( 75 - 577 ) ÷ 577] x 100 = -87%
Formula
Percentage change = [(75 - 577) / 577] x 100
Subtract the new number by the original number
75 - 577 = -502
-502 ÷ 577 = -0.8700173310225303
-0.8700173310225303 x 100 = -87%