387.78% is the change from 90 to 439
Calculation steps:
[( 439 - 90 ) ÷ 90] x 100 = 387.78%
Formula
Percentage change = [(439 - 90) / 90] x 100
Subtract the new number by the original number
439 - 90 = 349
349 ÷ 90 = 3.8777777777777778
3.8777777777777778 x 100 = 387.78%