140% is the change from 210 to 504
Calculation steps:
[( 504 - 210 ) ÷ 210] x 100 = 140%
Formula
Percentage change = [(504 - 210) / 210] x 100
Subtract the new number by the original number
504 - 210 = 294
294 ÷ 210 = 1.4
1.4 x 100 = 140%
Example