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Write 7/4 as a decimal

Step by step, with the reason for every step · Fractions and decimals · Foundations

Step by step

The question

Question: write 7/4 as a decimal.

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1 Make the bottom 10, 100 or 1000

A decimal is tenths, hundredths, thousandths.

So we want a bottom of 10, 100 or 1000.

4 times 25 is 100.

4 × 25 = 100

We multiply the top and the bottom by 25.

25/25 is 1, so the value stays the same.

= 7 × 254 × 25

7 times 25 is 175.

So we get 175/100.

= 175100

2 Write the decimal

100 has 2 zeros.

So the decimal has 2 digits after the point.

100: 2 zeros → 2 digits after the point

175 hundredths is 1.75.

= 1.75

3 Check

Let's check: the decimal times the bottom should give the top.

1.75 times 4.

Check: 1.75 × 4

Forget the points: 175 times 4 is 700.

The numbers have 2 digits after the point.

So the answer has 2 too: 7.00, which is 7.

175 × 4 = 700 → 7.00

We get 7, the top.

So the answer is right!

1.75 × 4 = 7

Let's look back.

First: make the bottom 10, 100 or 1000.

Then: write the decimal.

Last: check.

Answer
= 1.75

Your turn

Try this one yourself, then check:

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