-34.7% is the change from 487 to 318
Calculation steps:
[( 318 - 487 ) ÷ 487] x 100 = -34.7%
Formula
Percentage change = [(318 - 487) / 487] x 100
Subtract the new number by the original number
318 - 487 = -169
-169 ÷ 487 = -0.3470225872689938
-0.3470225872689938 x 100 = -34.7%