#### toponlinetool

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Can anyone please provide answer- 2/5 + 3/8 =?

- Thread starter toponlinetool
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Can anyone please provide answer- 2/5 + 3/8 =?

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\(\displaystyle \frac{2}{5} = \frac{2}{5} * 1\)

\(\displaystyle \frac{2}{5} = \frac{2}{5} * \frac{8}{8}\)

\(\displaystyle \frac{2}{5} = \frac{16}{40}\)

\(\displaystyle \frac{3}{8} = \frac{3}{8} * \frac{5}{5} = \frac{15}{40}\)

\(\displaystyle \frac{2}{5} = \frac{2}{5} * \frac{8}{8}\)

\(\displaystyle \frac{2}{5} = \frac{16}{40}\)

\(\displaystyle \frac{3}{8} = \frac{3}{8} * \frac{5}{5} = \frac{15}{40}\)

The fractions \(\displaystyle \frac{8}{8}\) and \(\displaystyle \frac{5}{5}\) were chosen because they were formed from the denominators of the "other" fraction, which ensures both of the fractions now have a denominator of \(\displaystyle 8 * 5 = 40\). With the denominators equivalent, adding \(\displaystyle \frac{16}{40} + \frac{15}{40}\) becomes trivial.

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Thanks...I followed your instructions, & got the answer- 31/40

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Thank u very much..Observe that \(\displaystyle \frac{x}{x} = 1\) for any fraction where \(\displaystyle x \ne 0\). Also note that when multiplying some number by 1, the result will be the same number you started with. You can use this fact to change the denominator in a fraction:

\(\displaystyle \frac{2}{5} = \frac{2}{5} * 1\)\(\displaystyle \frac{2}{5} = \frac{2}{5} * \frac{8}{8}\)\(\displaystyle \frac{2}{5} = \frac{16}{40}\)\(\displaystyle \frac{3}{8} = \frac{3}{8} * \frac{5}{5} = \frac{15}{40}\)

The fractions \(\displaystyle \frac{8}{8}\) and \(\displaystyle \frac{5}{5}\) were chosen because they were formed from the denominators of the "other" fraction, which ensures both of the fractions now have a denominator of \(\displaystyle 8 * 5 = 40\). With the denominators equivalent, adding \(\displaystyle \frac{16}{40} + \frac{15}{40}\) becomes trivial.

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Thanks for the help.leastcommon denominator, you can always getacommon denominator by multiplying the two denominator, here 8 and 5, together.

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Ok. Thanks..this one.

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… answer- 2/5 + 3/8

Hi. There's no need to type those hyphens. Some people might see them as negative signs.… the answer- 31/40

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ok.. will remember next time..thanxHi. There's no need to type those hyphens. Some people might see them as negative signs.