1500% is the change from 51 to 816
Calculation steps:
[( 816 - 51 ) ÷ 51] x 100 = 1500%
Formula
Percentage change = [(816 - 51) / 51] x 100
Subtract the new number by the original number
816 - 51 = 765
765 ÷ 51 = 15
15 x 100 = 1500%
Example