Add 21/56 and 56/70
21/56 + 56/70 is 47/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
21/56 = 21 × 5/56 × 5 = 105/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
56/70 = 56 × 4/70 × 4 = 224/280 - Add the two like fractions:
105/280 + 224/280 = 105 + 224/280 = 329/280 - 329/280 simplified gives 47/40
- So, 21/56 + 56/70 = 47/40
In mixed form: 17/40
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