-89.51% is the change from 667 to 70
Calculation steps:
[( 70 - 667 ) ÷ 667] x 100 = -89.51%
Formula
Percentage change = [(70 - 667) / 667] x 100
Subtract the new number by the original number
70 - 667 = -597
-597 ÷ 667 = -0.8950524737631185
-0.8950524737631185 x 100 = -89.51%