80.39% is the change from 311 to 561
Calculation steps:
[( 561 - 311 ) ÷ 311] x 100 = 80.39%
Formula
Percentage change = [(561 - 311) / 311] x 100
Subtract the new number by the original number
561 - 311 = 250
250 ÷ 311 = 0.8038585209003215
0.8038585209003215 x 100 = 80.39%