-49.6% is the change from 623 to 314
Calculation steps:
[( 314 - 623 ) ÷ 623] x 100 = -49.6%
Formula
Percentage change = [(314 - 623) / 623] x 100
Subtract the new number by the original number
314 - 623 = -309
-309 ÷ 623 = -0.4959871589085072
-0.4959871589085072 x 100 = -49.6%