How do you evaluate $4 2/7 - 1/6$ ?

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Answer 1 · 2016-07-16T08:16:01

You can convert the numbers to fractions and add them up

$4 2/7=4+2/7=28/7+2/7$ , since $4=28/7$

Observe that we have chosen the denominator $7$ carefully, because now we have:

$4+2/7=28/7+2/7=30/7$ . And now we can subtract:

$30/7-1/6=180/42-7/42$ where again we have chosen $42$ as the denominator because both $7$ and $6$ divide $42$ . Now we then have:

$30/7-1/6=180/42-7/42=173/42$ , or if you prefer $4 5/42$ , both are correct answers

How do you evaluate 4 2/7 - 1/64 2/7 - 1/6?