Add 84/15 and 21/12
1st number: 5 9/15, 2nd number: 1 9/12
84/15 + 21/12 is 147/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
84/15 = 84 × 4/15 × 4 = 336/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Add the two like fractions:
336/60 + 105/60 = 336 + 105/60 = 441/60 - 441/60 simplified gives 147/20
- So, 84/15 + 21/12 = 147/20
In mixed form: 77/20
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