Question

find a single discount equivalent to successive discounts of 20 and 50

Answer 1

Step-by-step explanation:

⇒ Single discount equivalent for successive discounts of 50% and 10%.

⇒ (50+10−

100

50×10%=55%

⇒ Single discount equivalent for successive discounts of 55% and 20%.

⇒ (55+20− 100/ 55×2o%=64%

Answer 2

Step-by-step explanation:

20% of 100 is 20; 100 — 20 = 80

5% of 80 is 0.05 x 80 = 4

80 — 4 = 76

100 — 76 = 24

So successive discounts of 20% and 5% is equivalent to a 24% discount. But this is only one specific example. Does this work for any amount?

Replace 100 with the variable P.

20% of P is 0.20P; the discounted amount is P — 0.20P = 0.80P

5% of 0.80P is 0.05(0.80P) =0.04P

Our final discounted amount is 0.80P — 0.04P = 0.76P.

P — 0.76P = 0.24P, so now we know that for any original value, successive discounts of 20% and 5% is equivalent to a 24% discount.

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