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Express 0.4 as a fraction in its simplest form.

March 26, 2026Mathematics

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Here are the solutions to the questions:

1. a) Express 0.4 as a fraction in its simplest form.

Write the decimal as a fraction.
$0.4 = \frac{4}{10}$
Simplify the fraction by dividing the numerator and denominator by their greatest common divisor, which is 2.
$\frac{4 \div 2}{10 \div 2} = \frac{2}{5}$
The fraction in its simplest form is $\boxed{\frac{2}{5}}$ .

1. b) Mwajuma assumed $\sqrt{0.4}$ to be 0.67. Find the percentage error in her assumption.
Calculate the actual

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