77.5% is the change from 360 to 639
Calculation steps:
[( 639 - 360 ) ÷ 360] x 100 = 77.5%
Formula
Percentage change = [(639 - 360) / 360] x 100
Subtract the new number by the original number
639 - 360 = 279
279 ÷ 360 = 0.775
0.775 x 100 = 77.5%
Example