Answer:
15*80%=12$ dollars he sold it for her
(multiply by 80% because he lost 20%)
12*120%=14.40$ she sold it
(multiply by 120% because she made 20% more than 100%- regular price )
Step-by-step explanation:
Barbara pay 12$ dollars. Barbara later sold the DVD. She pay 14.40 dollars.
The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Given; Ahmed bought a DVD for $15. He sold it to Barbara, making a 20% loss.
We need to find that how much did Barbara pay for it.
Barbara later sold the DVD. she made 20% profit and how much did She pay for it.
a) Now, multiply by 80% because he lost 20%.
15 x 80%
15 x 0.8 = 12$ dollars
b) Now, multiply by 120% because she made 20% more than 100%- regular price.
12 x 120%
12 x 0.12 = 14.40$
Barbara pay 12$ dollars. Barbara later sold the DVD. She pay 14.40 dollars.
Learn more about the unitary method;
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