-8.5% is the change from 341 to 312
Calculation steps:
[( 312 - 341 ) ÷ 341] x 100 = -8.5%
Formula
Percentage change = [(312 - 341) / 341] x 100
Subtract the new number by the original number
312 - 341 = -29
-29 ÷ 341 = -0.08504398826979472
-0.08504398826979472 x 100 = -8.5%