-89.29% is the change from 140 to 15
Calculation steps:
[( 15 - 140 ) ÷ 140] x 100 = -89.29%
Formula
Percentage change = [(15 - 140) / 140] x 100
Subtract the new number by the original number
15 - 140 = -125
-125 ÷ 140 = -0.8928571428571429
-0.8928571428571429 x 100 = -89.29%