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2 years ago

In a '20% off' sale, a coat was £220. Work out the original price.

2 answers:

7 0

80% is equal to 220

1) Set up a proportion:
80/100=220/x

2) Simplify:
4/5=220/x

3) Solve by cross-multiplying:
4x=1100
x=275

Original Price: 275

mario62 [17]2 years ago

3 0

80% of p = 220 (We know this as the sale price is 20% off, so there is still 80%)

0.8p = 220

p = 220/0.8 (This is because we are making p the subject of the formula)

p = 275 (If you are not allowed to use a calculator for this, then: 220/0.8 is the same as 2200/8 because we are just simply multiplying both the numerator and denominator by 10. This can be simply worked out by long division)

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Answer:

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Step-by-step explanation:

The measure of ∠a = x

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For vertically opposite angles,

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Taking like terms together,

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Step-by-step explanation:

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