-96.35% is the change from 520 to 19
Calculation steps:
[( 19 - 520 ) ÷ 520] x 100 = -96.35%
Formula
Percentage change = [(19 - 520) / 520] x 100
Subtract the new number by the original number
19 - 520 = -501
-501 ÷ 520 = -0.9634615384615385
-0.9634615384615385 x 100 = -96.35%