426.23% is the change from 61 to 321
Calculation steps:
[( 321 - 61 ) ÷ 61] x 100 = 426.23%
Formula
Percentage change = [(321 - 61) / 61] x 100
Subtract the new number by the original number
321 - 61 = 260
260 ÷ 61 = 4.262295081967213
4.262295081967213 x 100 = 426.23%