-96.06% is the change from 507 to 20
Calculation steps:
[( 20 - 507 ) ÷ 507] x 100 = -96.06%
Formula
Percentage change = [(20 - 507) / 507] x 100
Subtract the new number by the original number
20 - 507 = -487
-487 ÷ 507 = -0.960552268244576
-0.960552268244576 x 100 = -96.06%