1560% is the change from 50 to 830
Calculation steps:
[( 830 - 50 ) ÷ 50] x 100 = 1560%
Formula
Percentage change = [(830 - 50) / 50] x 100
Subtract the new number by the original number
830 - 50 = 780
780 ÷ 50 = 15.6
15.6 x 100 = 1560%
Example