20.69% is the change from 261 to 315
Calculation steps:
[( 315 - 261 ) ÷ 261] x 100 = 20.69%
Formula
Percentage change = [(315 - 261) / 261] x 100
Subtract the new number by the original number
315 - 261 = 54
54 ÷ 261 = 0.20689655172413793
0.20689655172413793 x 100 = 20.69%