445.45% is the change from 77 to 420
Calculation steps:
[( 420 - 77 ) ÷ 77] x 100 = 445.45%
Formula
Percentage change = [(420 - 77) / 77] x 100
Subtract the new number by the original number
420 - 77 = 343
343 ÷ 77 = 4.454545454545454
4.454545454545454 x 100 = 445.45%