61.3% is the change from 261 to 421
Calculation steps:
[( 421 - 261 ) ÷ 261] x 100 = 61.3%
Formula
Percentage change = [(421 - 261) / 261] x 100
Subtract the new number by the original number
421 - 261 = 160
160 ÷ 261 = 0.6130268199233716
0.6130268199233716 x 100 = 61.3%