909.8% is the change from 51 to 515
Calculation steps:
[( 515 - 51 ) ÷ 51] x 100 = 909.8%
Formula
Percentage change = [(515 - 51) / 51] x 100
Subtract the new number by the original number
515 - 51 = 464
464 ÷ 51 = 9.098039215686274
9.098039215686274 x 100 = 909.8%