311.11% is the change from 243 to 999
Calculation steps:
[( 999 - 243 ) ÷ 243] x 100 = 311.11%
Formula
Percentage change = [(999 - 243) / 243] x 100
Subtract the new number by the original number
999 - 243 = 756
756 ÷ 243 = 3.111111111111111
3.111111111111111 x 100 = 311.11%