Add 21/40 and 21/14
1st number: 21/40, 2nd number: 1 7/14
21/40 + 21/14 is 81/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 14 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 14 × 20 = 280,
21/14 = 21 × 20/14 × 20 = 420/280 - Add the two like fractions:
147/280 + 420/280 = 147 + 420/280 = 567/280 - 567/280 simplified gives 81/40
- So, 21/40 + 21/14 = 81/40
In mixed form: 21/40
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