858.57% is the change from 70 to 671
Calculation steps:
[( 671 - 70 ) ÷ 70] x 100 = 858.57%
Formula
Percentage change = [(671 - 70) / 70] x 100
Subtract the new number by the original number
671 - 70 = 601
601 ÷ 70 = 8.585714285714285
8.585714285714285 x 100 = 858.57%