-89.18% is the change from 647 to 70
Calculation steps:
[( 70 - 647 ) ÷ 647] x 100 = -89.18%
Formula
Percentage change = [(70 - 647) / 647] x 100
Subtract the new number by the original number
70 - 647 = -577
-577 ÷ 647 = -0.8918083462132921
-0.8918083462132921 x 100 = -89.18%