Add 54/15 and 42/56
1st number: 3 9/15, 2nd number: 42/56
54/15 + 42/56 is 87/20.
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,
54/15 = 54 × 56/15 × 56 = 3024/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
42/56 = 42 × 15/56 × 15 = 630/840 - Add the two like fractions:
3024/840 + 630/840 = 3024 + 630/840 = 3654/840 - 3654/840 simplified gives 87/20
- So, 54/15 + 42/56 = 87/20
In mixed form: 47/20
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