68.5% is the change from 381 to 642
Calculation steps:
[( 642 - 381 ) ÷ 381] x 100 = 68.5%
Formula
Percentage change = [(642 - 381) / 381] x 100
Subtract the new number by the original number
642 - 381 = 261
261 ÷ 381 = 0.6850393700787402
0.6850393700787402 x 100 = 68.5%