68.87% is the change from 379 to 640
Calculation steps:
[( 640 - 379 ) ÷ 379] x 100 = 68.87%
Formula
Percentage change = [(640 - 379) / 379] x 100
Subtract the new number by the original number
640 - 379 = 261
261 ÷ 379 = 0.6886543535620053
0.6886543535620053 x 100 = 68.87%