207.69% is the change from 273 to 840
Calculation steps:
[( 840 - 273 ) ÷ 273] x 100 = 207.69%
Formula
Percentage change = [(840 - 273) / 273] x 100
Subtract the new number by the original number
840 - 273 = 567
567 ÷ 273 = 2.076923076923077
2.076923076923077 x 100 = 207.69%