264.29% is the change from 140 to 510
Calculation steps:
[( 510 - 140 ) ÷ 140] x 100 = 264.29%
Formula
Percentage change = [(510 - 140) / 140] x 100
Subtract the new number by the original number
510 - 140 = 370
370 ÷ 140 = 2.642857142857143
2.642857142857143 x 100 = 264.29%