1142.86% is the change from 70 to 870
Calculation steps:
[( 870 - 70 ) ÷ 70] x 100 = 1142.86%
Formula
Percentage change = [(870 - 70) / 70] x 100
Subtract the new number by the original number
870 - 70 = 800
800 ÷ 70 = 11.428571428571429
11.428571428571429 x 100 = 1142.86%