-2.56% is the change from 351 to 342
Calculation steps:
[( 342 - 351 ) ÷ 351] x 100 = -2.56%
Formula
Percentage change = [(342 - 351) / 351] x 100
Subtract the new number by the original number
342 - 351 = -9
-9 ÷ 351 = -0.02564102564102564
-0.02564102564102564 x 100 = -2.56%