-91.84% is the change from 343 to 28
Calculation steps:
[( 28 - 343 ) ÷ 343] x 100 = -91.84%
Formula
Percentage change = [(28 - 343) / 343] x 100
Subtract the new number by the original number
28 - 343 = -315
-315 ÷ 343 = -0.9183673469387755
-0.9183673469387755 x 100 = -91.84%