-96.99% is the change from 698 to 21
Calculation steps:
[( 21 - 698 ) ÷ 698] x 100 = -96.99%
Formula
Percentage change = [(21 - 698) / 698] x 100
Subtract the new number by the original number
21 - 698 = -677
-677 ÷ 698 = -0.9699140401146131
-0.9699140401146131 x 100 = -96.99%