397.96% is the change from 98 to 488
Calculation steps:
[( 488 - 98 ) ÷ 98] x 100 = 397.96%
Formula
Percentage change = [(488 - 98) / 98] x 100
Subtract the new number by the original number
488 - 98 = 390
390 ÷ 98 = 3.979591836734694
3.979591836734694 x 100 = 397.96%