-37.36% is the change from 91 to 57
Calculation steps:
[( 57 - 91 ) ÷ 91] x 100 = -37.36%
Formula
Percentage change = [(57 - 91) / 91] x 100
Subtract the new number by the original number
57 - 91 = -34
-34 ÷ 91 = -0.37362637362637363
-0.37362637362637363 x 100 = -37.36%