Add 7/84 and 20/15
1st number: 7/84, 2nd number: 1 5/15
7/84 + 20/15 is 17/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
7/84 = 7 × 5/84 × 5 = 35/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
20/15 = 20 × 28/15 × 28 = 560/420 - Add the two like fractions:
35/420 + 560/420 = 35 + 560/420 = 595/420 - 595/420 simplified gives 17/12
- So, 7/84 + 20/15 = 17/12
In mixed form: 15/12
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