146.3% is the change from 270 to 665
Calculation steps:
[( 665 - 270 ) ÷ 270] x 100 = 146.3%
Formula
Percentage change = [(665 - 270) / 270] x 100
Subtract the new number by the original number
665 - 270 = 395
395 ÷ 270 = 1.462962962962963
1.462962962962963 x 100 = 146.3%