Add 28/30 and 21/56
28/30 + 21/56 is 157/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 30 × 28 = 840,
28/30 = 28 × 28/30 × 28 = 784/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
21/56 = 21 × 15/56 × 15 = 315/840 - Add the two like fractions:
784/840 + 315/840 = 784 + 315/840 = 1099/840 - 1099/840 simplified gives 157/120
- So, 28/30 + 21/56 = 157/120
In mixed form: 137/120
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