255.5% is the change from 209 to 743
Calculation steps:
[( 743 - 209 ) ÷ 209] x 100 = 255.5%
Formula
Percentage change = [(743 - 209) / 209] x 100
Subtract the new number by the original number
743 - 209 = 534
534 ÷ 209 = 2.555023923444976
2.555023923444976 x 100 = 255.5%