Add 54/21 and 15/9
1st number: 2 12/21, 2nd number: 1 6/9
54/21 + 15/9 is 89/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
54/21 = 54 × 3/21 × 3 = 162/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
15/9 = 15 × 7/9 × 7 = 105/63 - Add the two like fractions:
162/63 + 105/63 = 162 + 105/63 = 267/63 - 267/63 simplified gives 89/21
- So, 54/21 + 15/9 = 89/21
In mixed form: 45/21
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