10% is the change from 870 to 957
Calculation steps:
[( 957 - 870 ) ÷ 870] x 100 = 10%
Formula
Percentage change = [(957 - 870) / 870] x 100
Subtract the new number by the original number
957 - 870 = 87
87 ÷ 870 = 0.1
0.1 x 100 = 10%
Example