424.6% is the change from 126 to 661
Calculation steps:
[( 661 - 126 ) ÷ 126] x 100 = 424.6%
Formula
Percentage change = [(661 - 126) / 126] x 100
Subtract the new number by the original number
661 - 126 = 535
535 ÷ 126 = 4.246031746031746
4.246031746031746 x 100 = 424.6%