-98.01% is the change from 503 to 10
Calculation steps:
[( 10 - 503 ) ÷ 503] x 100 = -98.01%
Formula
Percentage change = [(10 - 503) / 503] x 100
Subtract the new number by the original number
10 - 503 = -493
-493 ÷ 503 = -0.9801192842942346
-0.9801192842942346 x 100 = -98.01%