140% is the change from 390 to 936
Calculation steps:
[( 936 - 390 ) ÷ 390] x 100 = 140%
Formula
Percentage change = [(936 - 390) / 390] x 100
Subtract the new number by the original number
936 - 390 = 546
546 ÷ 390 = 1.4
1.4 x 100 = 140%
Example