7.41% is the change from 810 to 870
Calculation steps:
[( 870 - 810 ) ÷ 810] x 100 = 7.41%
Formula
Percentage change = [(870 - 810) / 810] x 100
Subtract the new number by the original number
870 - 810 = 60
60 ÷ 810 = 0.07407407407407407
0.07407407407407407 x 100 = 7.41%