307.5% is the change from 120 to 489
Calculation steps:
[( 489 - 120 ) ÷ 120] x 100 = 307.5%
Formula
Percentage change = [(489 - 120) / 120] x 100
Subtract the new number by the original number
489 - 120 = 369
369 ÷ 120 = 3.075
3.075 x 100 = 307.5%
Example