-59.06% is the change from 171 to 70
Calculation steps:
[( 70 - 171 ) ÷ 171] x 100 = -59.06%
Formula
Percentage change = [(70 - 171) / 171] x 100
Subtract the new number by the original number
70 - 171 = -101
-101 ÷ 171 = -0.5906432748538012
-0.5906432748538012 x 100 = -59.06%