Add 21/84 and 63/5
1st number: 21/84, 2nd number: 12 3/5
21/84 + 63/5 is 257/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 5 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Likewise, for the 2nd fraction, since 5 × 84 = 420,
63/5 = 63 × 84/5 × 84 = 5292/420 - Add the two like fractions:
105/420 + 5292/420 = 105 + 5292/420 = 5397/420 - 5397/420 simplified gives 257/20
- So, 21/84 + 63/5 = 257/20
In mixed form: 1217/20
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