782.35% is the change from 51 to 450
Calculation steps:
[( 450 - 51 ) ÷ 51] x 100 = 782.35%
Formula
Percentage change = [(450 - 51) / 51] x 100
Subtract the new number by the original number
450 - 51 = 399
399 ÷ 51 = 7.823529411764706
7.823529411764706 x 100 = 782.35%