31.5% is the change from 581 to 764
Calculation steps:
[( 764 - 581 ) ÷ 581] x 100 = 31.5%
Formula
Percentage change = [(764 - 581) / 581] x 100
Subtract the new number by the original number
764 - 581 = 183
183 ÷ 581 = 0.31497418244406195
0.31497418244406195 x 100 = 31.5%