140% is the change from 270 to 648
Calculation steps:
[( 648 - 270 ) ÷ 270] x 100 = 140%
Formula
Percentage change = [(648 - 270) / 270] x 100
Subtract the new number by the original number
648 - 270 = 378
378 ÷ 270 = 1.4
1.4 x 100 = 140%
Example