-13.3% is the change from 451 to 391
Calculation steps:
[( 391 - 451 ) ÷ 451] x 100 = -13.3%
Formula
Percentage change = [(391 - 451) / 451] x 100
Subtract the new number by the original number
391 - 451 = -60
-60 ÷ 451 = -0.13303769401330376
-0.13303769401330376 x 100 = -13.3%