-37.13% is the change from 991 to 623
Calculation steps:
[( 623 - 991 ) ÷ 991] x 100 = -37.13%
Formula
Percentage change = [(623 - 991) / 991] x 100
Subtract the new number by the original number
623 - 991 = -368
-368 ÷ 991 = -0.3713420787083754
-0.3713420787083754 x 100 = -37.13%