-99.2% is the change from 623 to 5
Calculation steps:
[( 5 - 623 ) ÷ 623] x 100 = -99.2%
Formula
Percentage change = [(5 - 623) / 623] x 100
Subtract the new number by the original number
5 - 623 = -618
-618 ÷ 623 = -0.9919743178170144
-0.9919743178170144 x 100 = -99.2%