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Write 6/8 as a decimal

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

Step by step

The question

Question: write 6/8 as a decimal.

68

1 Simplify first

6 and 8 can both be divided by 2.

Smaller numbers are easier.

= 6 ÷ 28 ÷ 2

So it is 3/4.

= 34

2 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.

= 3 × 254 × 25

3 times 25 is 75.

So we get 75/100.

= 75100

3 Write the decimal

100 has 2 zeros.

So the decimal has 2 digits after the point.

100: 2 zeros → 2 digits after the point

75 hundredths is 0.75.

= 0.75

4 Check

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

0.75 times 8.

Check: 0.75 × 8

Forget the points: 75 times 8 is 600.

The numbers have 2 digits after the point.

So the answer has 2 too: 6.00, which is 6.

75 × 8 = 600 → 6.00

We get 6, the top.

So the answer is right!

0.75 × 8 = 6

Let's look back.

First: simplify first.

Then: make the bottom 10, 100 or 1000.

Then: write the decimal.

Last: check.

Answer
= 0.75

Your turn

Try this one yourself, then check:

912
Show the answer
0.75

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