Add 81/21 and 63/35
1st number: 3 18/21, 2nd number: 1 28/35
81/21 + 63/35 is 198/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
81/21 = 81 × 5/21 × 5 = 405/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
63/35 = 63 × 3/35 × 3 = 189/105 - Add the two like fractions:
405/105 + 189/105 = 405 + 189/105 = 594/105 - 594/105 simplified gives 198/35
- So, 81/21 + 63/35 = 198/35
In mixed form: 523/35
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