-24.78% is the change from 343 to 258
Calculation steps:
[( 258 - 343 ) ÷ 343] x 100 = -24.78%
Formula
Percentage change = [(258 - 343) / 343] x 100
Subtract the new number by the original number
258 - 343 = -85
-85 ÷ 343 = -0.2478134110787172
-0.2478134110787172 x 100 = -24.78%