-87.8% is the change from 623 to 76
Calculation steps:
[( 76 - 623 ) ÷ 623] x 100 = -87.8%
Formula
Percentage change = [(76 - 623) / 623] x 100
Subtract the new number by the original number
76 - 623 = -547
-547 ÷ 623 = -0.8780096308186196
-0.8780096308186196 x 100 = -87.8%