Add 56/8 and 15/21
1st number: 7 0/8, 2nd number: 15/21
56/8 + 15/21 is 54/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
56/8 = 56 × 21/8 × 21 = 1176/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
15/21 = 15 × 8/21 × 8 = 120/168 - Add the two like fractions:
1176/168 + 120/168 = 1176 + 120/168 = 1296/168 - 1296/168 simplified gives 54/7
- So, 56/8 + 15/21 = 54/7
In mixed form: 75/7
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