76.8% is the change from 181 to 320
Calculation steps:
[( 320 - 181 ) ÷ 181] x 100 = 76.8%
Formula
Percentage change = [(320 - 181) / 181] x 100
Subtract the new number by the original number
320 - 181 = 139
139 ÷ 181 = 0.7679558011049724
0.7679558011049724 x 100 = 76.8%