-64.29% is the change from 140 to 50
Calculation steps:
[( 50 - 140 ) ÷ 140] x 100 = -64.29%
Formula
Percentage change = [(50 - 140) / 140] x 100
Subtract the new number by the original number
50 - 140 = -90
-90 ÷ 140 = -0.6428571428571429
-0.6428571428571429 x 100 = -64.29%