Successive discount

Algebra Level 2

Which discount is greater ?

a: One time discount of 60%

b. 30% discount + 30% discount

c. 45% discount + 45% discount

d. 35% discount + 25% discount

c d a b

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1 solution

Harri Bell-Thomas
Oct 19, 2014

With a, you pay 40 % 40\% %

With b, you pay

0.7 × 0.7 = 49 % 0.7 \times 0.7 = 49\% %

With c, you pay

0.55 × 0.55 = 30.25 % 0.55 \times 0.55 = 30.25\% %

With d, you pay

0.65 × 0.75 = 48.75 % 0.65 \times 0.75 = 48.75\% %

Therefore c is the best.

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