-20.51% is the change from 351 to 279
Calculation steps:
[( 279 - 351 ) ÷ 351] x 100 = -20.51%
Formula
Percentage change = [(279 - 351) / 351] x 100
Subtract the new number by the original number
279 - 351 = -72
-72 ÷ 351 = -0.20512820512820512
-0.20512820512820512 x 100 = -20.51%