6.49% is the change from 817 to 870
Calculation steps:
[( 870 - 817 ) ÷ 817] x 100 = 6.49%
Formula
Percentage change = [(870 - 817) / 817] x 100
Subtract the new number by the original number
870 - 817 = 53
53 ÷ 817 = 0.06487148102815178
0.06487148102815178 x 100 = 6.49%