-79.04% is the change from 501 to 105
Calculation steps:
[( 105 - 501 ) ÷ 501] x 100 = -79.04%
Formula
Percentage change = [(105 - 501) / 501] x 100
Subtract the new number by the original number
105 - 501 = -396
-396 ÷ 501 = -0.7904191616766467
-0.7904191616766467 x 100 = -79.04%