-49.78% is the change from 681 to 342
Calculation steps:
[( 342 - 681 ) ÷ 681] x 100 = -49.78%
Formula
Percentage change = [(342 - 681) / 681] x 100
Subtract the new number by the original number
342 - 681 = -339
-339 ÷ 681 = -0.4977973568281938
-0.4977973568281938 x 100 = -49.78%