-33.89% is the change from 481 to 318
Calculation steps:
[( 318 - 481 ) ÷ 481] x 100 = -33.89%
Formula
Percentage change = [(318 - 481) / 481] x 100
Subtract the new number by the original number
318 - 481 = -163
-163 ÷ 481 = -0.3388773388773389
-0.3388773388773389 x 100 = -33.89%