-73.33% is the change from 75 to 20
Calculation steps:
[( 20 - 75 ) ÷ 75] x 100 = -73.33%
Formula
Percentage change = [(20 - 75) / 75] x 100
Subtract the new number by the original number
20 - 75 = -55
-55 ÷ 75 = -0.7333333333333333
-0.7333333333333333 x 100 = -73.33%