243.43% is the change from 99 to 340
Calculation steps:
[( 340 - 99 ) ÷ 99] x 100 = 243.43%
Formula
Percentage change = [(340 - 99) / 99] x 100
Subtract the new number by the original number
340 - 99 = 241
241 ÷ 99 = 2.4343434343434343
2.4343434343434343 x 100 = 243.43%