84.5% is the change from 342 to 631
Calculation steps:
[( 631 - 342 ) ÷ 342] x 100 = 84.5%
Formula
Percentage change = [(631 - 342) / 342] x 100
Subtract the new number by the original number
631 - 342 = 289
289 ÷ 342 = 0.8450292397660819
0.8450292397660819 x 100 = 84.5%