447.93% is the change from 121 to 663
Calculation steps:
[( 663 - 121 ) ÷ 121] x 100 = 447.93%
Formula
Percentage change = [(663 - 121) / 121] x 100
Subtract the new number by the original number
663 - 121 = 542
542 ÷ 121 = 4.479338842975206
4.479338842975206 x 100 = 447.93%