-79.61% is the change from 103 to 21
Calculation steps:
[( 21 - 103 ) ÷ 103] x 100 = -79.61%
Formula
Percentage change = [(21 - 103) / 103] x 100
Subtract the new number by the original number
21 - 103 = -82
-82 ÷ 103 = -0.7961165048543689
-0.7961165048543689 x 100 = -79.61%