122.22% is the change from 378 to 840
Calculation steps:
[( 840 - 378 ) ÷ 378] x 100 = 122.22%
Formula
Percentage change = [(840 - 378) / 378] x 100
Subtract the new number by the original number
840 - 378 = 462
462 ÷ 378 = 1.2222222222222223
1.2222222222222223 x 100 = 122.22%