59.2% is the change from 402 to 640
Calculation steps:
[( 640 - 402 ) ÷ 402] x 100 = 59.2%
Formula
Percentage change = [(640 - 402) / 402] x 100
Subtract the new number by the original number
640 - 402 = 238
238 ÷ 402 = 0.5920398009950248
0.5920398009950248 x 100 = 59.2%