-60% is the change from 350 to 140
Calculation steps:
[( 140 - 350 ) ÷ 350] x 100 = -60%
Formula
Percentage change = [(140 - 350) / 350] x 100
Subtract the new number by the original number
140 - 350 = -210
-210 ÷ 350 = -0.6
-0.6 x 100 = -60%
Example