-95.78% is the change from 498 to 21
Calculation steps:
[( 21 - 498 ) ÷ 498] x 100 = -95.78%
Formula
Percentage change = [(21 - 498) / 498] x 100
Subtract the new number by the original number
21 - 498 = -477
-477 ÷ 498 = -0.9578313253012049
-0.9578313253012049 x 100 = -95.78%