1098.57% is the change from 70 to 839
Calculation steps:
[( 839 - 70 ) ÷ 70] x 100 = 1098.57%
Formula
Percentage change = [(839 - 70) / 70] x 100
Subtract the new number by the original number
839 - 70 = 769
769 ÷ 70 = 10.985714285714286
10.985714285714286 x 100 = 1098.57%