88.63% is the change from 343 to 647
Calculation steps:
[( 647 - 343 ) ÷ 343] x 100 = 88.63%
Formula
Percentage change = [(647 - 343) / 343] x 100
Subtract the new number by the original number
647 - 343 = 304
304 ÷ 343 = 0.8862973760932945
0.8862973760932945 x 100 = 88.63%