-79.92% is the change from 498 to 100
Calculation steps:
[( 100 - 498 ) ÷ 498] x 100 = -79.92%
Formula
Percentage change = [(100 - 498) / 498] x 100
Subtract the new number by the original number
100 - 498 = -398
-398 ÷ 498 = -0.7991967871485943
-0.7991967871485943 x 100 = -79.92%