1520% is the change from 50 to 810
Calculation steps:
[( 810 - 50 ) ÷ 50] x 100 = 1520%
Formula
Percentage change = [(810 - 50) / 50] x 100
Subtract the new number by the original number
810 - 50 = 760
760 ÷ 50 = 15.2
15.2 x 100 = 1520%
Example