-19.2% is the change from 771 to 623
Calculation steps:
[( 623 - 771 ) ÷ 771] x 100 = -19.2%
Formula
Percentage change = [(623 - 771) / 771] x 100
Subtract the new number by the original number
623 - 771 = -148
-148 ÷ 771 = -0.191958495460441
-0.191958495460441 x 100 = -19.2%