-12.82% is the change from 351 to 306
Calculation steps:
[( 306 - 351 ) ÷ 351] x 100 = -12.82%
Formula
Percentage change = [(306 - 351) / 351] x 100
Subtract the new number by the original number
306 - 351 = -45
-45 ÷ 351 = -0.1282051282051282
-0.1282051282051282 x 100 = -12.82%