-18.39% is the change from 310 to 253
Calculation steps:
[( 253 - 310 ) ÷ 310] x 100 = -18.39%
Formula
Percentage change = [(253 - 310) / 310] x 100
Subtract the new number by the original number
253 - 310 = -57
-57 ÷ 310 = -0.18387096774193548
-0.18387096774193548 x 100 = -18.39%