61.41% is the change from 311 to 502
Calculation steps:
[( 502 - 311 ) ÷ 311] x 100 = 61.41%
Formula
Percentage change = [(502 - 311) / 311] x 100
Subtract the new number by the original number
502 - 311 = 191
191 ÷ 311 = 0.6141479099678456
0.6141479099678456 x 100 = 61.41%