84.21% is the change from 342 to 630
Calculation steps:
[( 630 - 342 ) ÷ 342] x 100 = 84.21%
Formula
Percentage change = [(630 - 342) / 342] x 100
Subtract the new number by the original number
630 - 342 = 288
288 ÷ 342 = 0.8421052631578947
0.8421052631578947 x 100 = 84.21%