18.27% is the change from 520 to 615
Calculation steps:
[( 615 - 520 ) ÷ 520] x 100 = 18.27%
Formula
Percentage change = [(615 - 520) / 520] x 100
Subtract the new number by the original number
615 - 520 = 95
95 ÷ 520 = 0.18269230769230768
0.18269230769230768 x 100 = 18.27%