279.01% is the change from 243 to 921
Calculation steps:
[( 921 - 243 ) ÷ 243] x 100 = 279.01%
Formula
Percentage change = [(921 - 243) / 243] x 100
Subtract the new number by the original number
921 - 243 = 678
678 ÷ 243 = 2.7901234567901234
2.7901234567901234 x 100 = 279.01%