Question

using complements (with respect to 1) of the single discounts,
find the net cost equivalent for the discount 20/50.
the net cost equivalent is $square$

Explanation:

Step1: Convert discounts to complements

For discount 20% (0.2), complement is $1 - 0.2 = 0.8$
For discount 50% (0.5), complement is $1 - 0.5 = 0.5$

Step2: Multiply the complements

$0.8 \times 0.5 = 0.4$

Step3: Convert to net cost equivalent

The result is already the net cost equivalent.

Answer:

0.4