100% is the change from 243 to 486
Calculation steps:
[( 486 - 243 ) ÷ 243] x 100 = 100%
Formula
Percentage change = [(486 - 243) / 243] x 100
Subtract the new number by the original number
486 - 243 = 243
243 ÷ 243 = 1
1 x 100 = 100%
Example