138.57% is the change from 210 to 501
Calculation steps:
[( 501 - 210 ) ÷ 210] x 100 = 138.57%
Formula
Percentage change = [(501 - 210) / 210] x 100
Subtract the new number by the original number
501 - 210 = 291
291 ÷ 210 = 1.3857142857142857
1.3857142857142857 x 100 = 138.57%