-29.2% is the change from 339 to 240
Calculation steps:
[( 240 - 339 ) ÷ 339] x 100 = -29.2%
Formula
Percentage change = [(240 - 339) / 339] x 100
Subtract the new number by the original number
240 - 339 = -99
-99 ÷ 339 = -0.2920353982300885
-0.2920353982300885 x 100 = -29.2%