-22.45% is the change from 343 to 266
Calculation steps:
[( 266 - 343 ) ÷ 343] x 100 = -22.45%
Formula
Percentage change = [(266 - 343) / 343] x 100
Subtract the new number by the original number
266 - 343 = -77
-77 ÷ 343 = -0.22448979591836735
-0.22448979591836735 x 100 = -22.45%