-3.09% is the change from 486 to 471
Calculation steps:
[( 471 - 486 ) ÷ 486] x 100 = -3.09%
Formula
Percentage change = [(471 - 486) / 486] x 100
Subtract the new number by the original number
471 - 486 = -15
-15 ÷ 486 = -0.030864197530864196
-0.030864197530864196 x 100 = -3.09%