-94.41% is the change from 340 to 19
Calculation steps:
[( 19 - 340 ) ÷ 340] x 100 = -94.41%
Formula
Percentage change = [(19 - 340) / 340] x 100
Subtract the new number by the original number
19 - 340 = -321
-321 ÷ 340 = -0.9441176470588235
-0.9441176470588235 x 100 = -94.41%