Add 63/21 and 21/15
1st number: 3 0/21, 2nd number: 1 6/15
63/21 + 21/15 is 22/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
21/15 = 21 × 7/15 × 7 = 147/105 - Add the two like fractions:
315/105 + 147/105 = 315 + 147/105 = 462/105 - 462/105 simplified gives 22/5
- So, 63/21 + 21/15 = 22/5
In mixed form: 42/5
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