52.2% is the change from 615 to 936
Calculation steps:
[( 936 - 615 ) ÷ 615] x 100 = 52.2%
Formula
Percentage change = [(936 - 615) / 615] x 100
Subtract the new number by the original number
936 - 615 = 321
321 ÷ 615 = 0.5219512195121951
0.5219512195121951 x 100 = 52.2%