-19.81% is the change from 313 to 251
Calculation steps:
[( 251 - 313 ) ÷ 313] x 100 = -19.81%
Formula
Percentage change = [(251 - 313) / 313] x 100
Subtract the new number by the original number
251 - 313 = -62
-62 ÷ 313 = -0.19808306709265175
-0.19808306709265175 x 100 = -19.81%