833.33% is the change from 45 to 420
Calculation steps:
[( 420 - 45 ) ÷ 45] x 100 = 833.33%
Formula
Percentage change = [(420 - 45) / 45] x 100
Subtract the new number by the original number
420 - 45 = 375
375 ÷ 45 = 8.333333333333334
8.333333333333334 x 100 = 833.33%