81.5% is the change from 346 to 628
Calculation steps:
[( 628 - 346 ) ÷ 346] x 100 = 81.5%
Formula
Percentage change = [(628 - 346) / 346] x 100
Subtract the new number by the original number
628 - 346 = 282
282 ÷ 346 = 0.815028901734104
0.815028901734104 x 100 = 81.5%