5040% is the change from 15 to 771
Calculation steps:
[( 771 - 15 ) ÷ 15] x 100 = 5040%
Formula
Percentage change = [(771 - 15) / 15] x 100
Subtract the new number by the original number
771 - 15 = 756
756 ÷ 15 = 50.4
50.4 x 100 = 5040%
Example