144.5% is the change from 209 to 511
Calculation steps:
[( 511 - 209 ) ÷ 209] x 100 = 144.5%
Formula
Percentage change = [(511 - 209) / 209] x 100
Subtract the new number by the original number
511 - 209 = 302
302 ÷ 209 = 1.444976076555024
1.444976076555024 x 100 = 144.5%