150% is the change from 270 to 675
Calculation steps:
[( 675 - 270 ) ÷ 270] x 100 = 150%
Formula
Percentage change = [(675 - 270) / 270] x 100
Subtract the new number by the original number
675 - 270 = 405
405 ÷ 270 = 1.5
1.5 x 100 = 150%
Example