158.3% is the change from 247 to 638
Calculation steps:
[( 638 - 247 ) ÷ 247] x 100 = 158.3%
Formula
Percentage change = [(638 - 247) / 247] x 100
Subtract the new number by the original number
638 - 247 = 391
391 ÷ 247 = 1.582995951417004
1.582995951417004 x 100 = 158.3%