Add 21/56 and 30/70
21/56 + 30/70 is 45/56.
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,
30/70 = 30 × 4/70 × 4 = 120/280 - Add the two like fractions:
105/280 + 120/280 = 105 + 120/280 = 225/280 - 225/280 simplified gives 45/56
- So, 21/56 + 30/70 = 45/56
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