31.54% is the change from 615 to 809
Calculation steps:
[( 809 - 615 ) ÷ 615] x 100 = 31.54%
Formula
Percentage change = [(809 - 615) / 615] x 100
Subtract the new number by the original number
809 - 615 = 194
194 ÷ 615 = 0.3154471544715447
0.3154471544715447 x 100 = 31.54%