Answer:

4℅

Step-by-step explanation:

let the total c. p. be 100 units

so

marked price = 120 units i.e. 20℅ above c. p.

a/q

discount = 20℅ on MRP i. e. 120 ×20/100 = 24 units

that means

s. p. = MRP - Discount => 120-24 = 96 units

so,

loss = c. p. - s. p.

=> loss = 100-96 = 4 units

&

loss ℅ = loss×100/c.p.

=> loss ℅ = 4×100/100 = 4℅ (answer)

s. p. =