134.43% is the change from 273 to 640
Calculation steps:
[( 640 - 273 ) ÷ 273] x 100 = 134.43%
Formula
Percentage change = [(640 - 273) / 273] x 100
Subtract the new number by the original number
640 - 273 = 367
367 ÷ 273 = 1.3443223443223444
1.3443223443223444 x 100 = 134.43%