314.88% is the change from 121 to 502
Calculation steps:
[( 502 - 121 ) ÷ 121] x 100 = 314.88%
Formula
Percentage change = [(502 - 121) / 121] x 100
Subtract the new number by the original number
502 - 121 = 381
381 ÷ 121 = 3.1487603305785123
3.1487603305785123 x 100 = 314.88%