145.76% is the change from 271 to 666
Calculation steps:
[( 666 - 271 ) ÷ 271] x 100 = 145.76%
Formula
Percentage change = [(666 - 271) / 271] x 100
Subtract the new number by the original number
666 - 271 = 395
395 ÷ 271 = 1.4575645756457565
1.4575645756457565 x 100 = 145.76%