-97.27% is the change from 623 to 17
Calculation steps:
[( 17 - 623 ) ÷ 623] x 100 = -97.27%
Formula
Percentage change = [(17 - 623) / 623] x 100
Subtract the new number by the original number
17 - 623 = -606
-606 ÷ 623 = -0.9727126805778491
-0.9727126805778491 x 100 = -97.27%