-98% is the change from 501 to 10
Calculation steps:
[( 10 - 501 ) ÷ 501] x 100 = -98%
Formula
Percentage change = [(10 - 501) / 501] x 100
Subtract the new number by the original number
10 - 501 = -491
-491 ÷ 501 = -0.9800399201596807
-0.9800399201596807 x 100 = -98%