Add 21/12 and 1/45
1st number: 1 9/12, 2nd number: 1/45
21/12 + 1/45 is 319/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
21/12 = 21 × 15/12 × 15 = 315/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
1/45 = 1 × 4/45 × 4 = 4/180 - Add the two like fractions:
315/180 + 4/180 = 315 + 4/180 = 319/180 - So, 21/12 + 1/45 = 319/180
In mixed form: 1139/180
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