-17.32% is the change from 306 to 253
Calculation steps:
[( 253 - 306 ) ÷ 306] x 100 = -17.32%
Formula
Percentage change = [(253 - 306) / 306] x 100
Subtract the new number by the original number
253 - 306 = -53
-53 ÷ 306 = -0.17320261437908496
-0.17320261437908496 x 100 = -17.32%