40% is a percentage. The question is asking you to write it as a fraction and as a decimal.
Let's practise

Write 40% as a fraction and as a decimal.

- Read the question and then read it again. What is it asking you to do?
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- Remember that percent (%) means per 100, or out of a hundred.
Find the fraction equivalent.
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40% means 40 out of 100
40% = =
- Remember that fractions with 10 or 100 as the denominator are easy to write as decimals.
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= 40 ÷ 100 = 0.4
OR
= 4 ÷ 10 = 0.4
- What is your answer? Check your working.
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40% = = 0.4