71.5% is the change from 200 to 343
Calculation steps:
[( 343 - 200 ) ÷ 200] x 100 = 71.5%
Formula
Percentage change = [(343 - 200) / 200] x 100
Subtract the new number by the original number
343 - 200 = 143
143 ÷ 200 = 0.715
0.715 x 100 = 71.5%
Example