64.11% is the change from 209 to 343
Calculation steps:
[( 343 - 209 ) ÷ 209] x 100 = 64.11%
Formula
Percentage change = [(343 - 209) / 209] x 100
Subtract the new number by the original number
343 - 209 = 134
134 ÷ 209 = 0.6411483253588517
0.6411483253588517 x 100 = 64.11%