-4.95% is the change from 303 to 288
Calculation steps:
[( 288 - 303 ) ÷ 303] x 100 = -4.95%
Formula
Percentage change = [(288 - 303) / 303] x 100
Subtract the new number by the original number
288 - 303 = -15
-15 ÷ 303 = -0.04950495049504951
-0.04950495049504951 x 100 = -4.95%