-84.26% is the change from 343 to 54
Calculation steps:
[( 54 - 343 ) ÷ 343] x 100 = -84.26%
Formula
Percentage change = [(54 - 343) / 343] x 100
Subtract the new number by the original number
54 - 343 = -289
-289 ÷ 343 = -0.8425655976676385
-0.8425655976676385 x 100 = -84.26%