-16.35% is the change from 318 to 266
Calculation steps:
[( 266 - 318 ) ÷ 318] x 100 = -16.35%
Formula
Percentage change = [(266 - 318) / 318] x 100
Subtract the new number by the original number
266 - 318 = -52
-52 ÷ 318 = -0.16352201257861634
-0.16352201257861634 x 100 = -16.35%