Add 3/21 and 7/56
3/21 + 7/56 is 15/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
3/21 = 3 × 8/21 × 8 = 24/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
7/56 = 7 × 3/56 × 3 = 21/168 - Add the two like fractions:
24/168 + 21/168 = 24 + 21/168 = 45/168 - 45/168 simplified gives 15/56
- So, 3/21 + 7/56 = 15/56
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