-7.2% is the change from 486 to 451
Calculation steps:
[( 451 - 486 ) ÷ 486] x 100 = -7.2%
Formula
Percentage change = [(451 - 486) / 486] x 100
Subtract the new number by the original number
451 - 486 = -35
-35 ÷ 486 = -0.0720164609053498
-0.0720164609053498 x 100 = -7.2%