15% is the change from 780 to 897
Calculation steps:
[( 897 - 780 ) ÷ 780] x 100 = 15%
Formula
Percentage change = [(897 - 780) / 780] x 100
Subtract the new number by the original number
897 - 780 = 117
117 ÷ 780 = 0.15
0.15 x 100 = 15%
Example