77.78% is the change from 90 to 160
Calculation steps:
[( 160 - 90 ) ÷ 90] x 100 = 77.78%
Formula
Percentage change = [(160 - 90) / 90] x 100
Subtract the new number by the original number
160 - 90 = 70
70 ÷ 90 = 0.7777777777777778
0.7777777777777778 x 100 = 77.78%