725.49% is the change from 51 to 421
Calculation steps:
[( 421 - 51 ) ÷ 51] x 100 = 725.49%
Formula
Percentage change = [(421 - 51) / 51] x 100
Subtract the new number by the original number
421 - 51 = 370
370 ÷ 51 = 7.254901960784314
7.254901960784314 x 100 = 725.49%