-96.88% is the change from 674 to 21
Calculation steps:
[( 21 - 674 ) ÷ 674] x 100 = -96.88%
Formula
Percentage change = [(21 - 674) / 674] x 100
Subtract the new number by the original number
21 - 674 = -653
-653 ÷ 674 = -0.9688427299703264
-0.9688427299703264 x 100 = -96.88%