-87.32% is the change from 623 to 79
Calculation steps:
[( 79 - 623 ) ÷ 623] x 100 = -87.32%
Formula
Percentage change = [(79 - 623) / 623] x 100
Subtract the new number by the original number
79 - 623 = -544
-544 ÷ 623 = -0.8731942215088283
-0.8731942215088283 x 100 = -87.32%