45.56% is the change from 90 to 131
Calculation steps:
[( 131 - 90 ) ÷ 90] x 100 = 45.56%
Formula
Percentage change = [(131 - 90) / 90] x 100
Subtract the new number by the original number
131 - 90 = 41
41 ÷ 90 = 0.45555555555555555
0.45555555555555555 x 100 = 45.56%