-63.79% is the change from 939 to 340
Calculation steps:
[( 340 - 939 ) ÷ 939] x 100 = -63.79%
Formula
Percentage change = [(340 - 939) / 939] x 100
Subtract the new number by the original number
340 - 939 = -599
-599 ÷ 939 = -0.6379126730564431
-0.6379126730564431 x 100 = -63.79%