-89.21% is the change from 649 to 70
Calculation steps:
[( 70 - 649 ) ÷ 649] x 100 = -89.21%
Formula
Percentage change = [(70 - 649) / 649] x 100
Subtract the new number by the original number
70 - 649 = -579
-579 ÷ 649 = -0.8921417565485362
-0.8921417565485362 x 100 = -89.21%