84.68% is the change from 346 to 639
Calculation steps:
[( 639 - 346 ) ÷ 346] x 100 = 84.68%
Formula
Percentage change = [(639 - 346) / 346] x 100
Subtract the new number by the original number
639 - 346 = 293
293 ÷ 346 = 0.846820809248555
0.846820809248555 x 100 = 84.68%