-19.87% is the change from 312 to 250
Calculation steps:
[( 250 - 312 ) ÷ 312] x 100 = -19.87%
Formula
Percentage change = [(250 - 312) / 312] x 100
Subtract the new number by the original number
250 - 312 = -62
-62 ÷ 312 = -0.1987179487179487
-0.1987179487179487 x 100 = -19.87%