-87.46% is the change from 662 to 83
Calculation steps:
[( 83 - 662 ) ÷ 662] x 100 = -87.46%
Formula
Percentage change = [(83 - 662) / 662] x 100
Subtract the new number by the original number
83 - 662 = -579
-579 ÷ 662 = -0.8746223564954683
-0.8746223564954683 x 100 = -87.46%