Add 21/7 and 28/56
1st number: 3 0/7, 2nd number: 28/56
21/7 + 28/56 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 56 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
21/7 = 21 × 8/7 × 8 = 168/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
28/56 = 28 × 1/56 × 1 = 28/56 - Add the two like fractions:
168/56 + 28/56 = 168 + 28/56 = 196/56 - 196/56 simplified gives 7/2
- So, 21/7 + 28/56 = 7/2
In mixed form: 31/2
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