-73.3% is the change from 663 to 177
Calculation steps:
[( 177 - 663 ) ÷ 663] x 100 = -73.3%
Formula
Percentage change = [(177 - 663) / 663] x 100
Subtract the new number by the original number
177 - 663 = -486
-486 ÷ 663 = -0.7330316742081447
-0.7330316742081447 x 100 = -73.3%