Add 21/40 and 56/70
21/40 + 56/70 is 53/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
56/70 = 56 × 4/70 × 4 = 224/280 - Add the two like fractions:
147/280 + 224/280 = 147 + 224/280 = 371/280 - 371/280 simplified gives 53/40
- So, 21/40 + 56/70 = 53/40
In mixed form: 113/40
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