-89.2% is the change from 648 to 70
Calculation steps:
[( 70 - 648 ) ÷ 648] x 100 = -89.2%
Formula
Percentage change = [(70 - 648) / 648] x 100
Subtract the new number by the original number
70 - 648 = -578
-578 ÷ 648 = -0.8919753086419753
-0.8919753086419753 x 100 = -89.2%