164.61% is the change from 243 to 643
Calculation steps:
[( 643 - 243 ) ÷ 243] x 100 = 164.61%
Formula
Percentage change = [(643 - 243) / 243] x 100
Subtract the new number by the original number
643 - 243 = 400
400 ÷ 243 = 1.646090534979424
1.646090534979424 x 100 = 164.61%