147.1% is the change from 259 to 640
Calculation steps:
[( 640 - 259 ) ÷ 259] x 100 = 147.1%
Formula
Percentage change = [(640 - 259) / 259] x 100
Subtract the new number by the original number
640 - 259 = 381
381 ÷ 259 = 1.471042471042471
1.471042471042471 x 100 = 147.1%