-90.21% is the change from 623 to 61
Calculation steps:
[( 61 - 623 ) ÷ 623] x 100 = -90.21%
Formula
Percentage change = [(61 - 623) / 623] x 100
Subtract the new number by the original number
61 - 623 = -562
-562 ÷ 623 = -0.9020866773675762
-0.9020866773675762 x 100 = -90.21%