-83.67% is the change from 343 to 56
Calculation steps:
[( 56 - 343 ) ÷ 343] x 100 = -83.67%
Formula
Percentage change = [(56 - 343) / 343] x 100
Subtract the new number by the original number
56 - 343 = -287
-287 ÷ 343 = -0.8367346938775511
-0.8367346938775511 x 100 = -83.67%