Hiroshi multiplied 2/7 times 3 and got 6/21 what final answer should he have gotten?
To multiply fractions, you need to multiply the numerators (the top numbers) and the denominators (the bottom numbers).
In this case, Hiroshi multiplied (2/7) * 3.
The numerator of (2/7) is 2, and when multiplied by 3, it becomes 6.
The denominator of (2/7) is 7, and it remains the same when multiplied by 3.
Therefore, the correct result Hiroshi should have obtained is 6/7.