-12.5% is the change from 304 to 266
Calculation steps:
[( 266 - 304 ) ÷ 304] x 100 = -12.5%
Formula
Percentage change = [(266 - 304) / 304] x 100
Subtract the new number by the original number
266 - 304 = -38
-38 ÷ 304 = -0.125
-0.125 x 100 = -12.5%