139.52% is the change from 210 to 503
Calculation steps:
[( 503 - 210 ) ÷ 210] x 100 = 139.52%
Formula
Percentage change = [(503 - 210) / 210] x 100
Subtract the new number by the original number
503 - 210 = 293
293 ÷ 210 = 1.3952380952380952
1.3952380952380952 x 100 = 139.52%