Add 21/15 and 20/56
1st number: 1 6/15, 2nd number: 20/56
21/15 + 20/56 is 123/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
21/15 = 21 × 56/15 × 56 = 1176/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
20/56 = 20 × 15/56 × 15 = 300/840 - Add the two like fractions:
1176/840 + 300/840 = 1176 + 300/840 = 1476/840 - 1476/840 simplified gives 123/70
- So, 21/15 + 20/56 = 123/70
In mixed form: 153/70
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