Add 12/15 and 20/84
12/15 + 20/84 is 109/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
12/15 = 12 × 28/15 × 28 = 336/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Add the two like fractions:
336/420 + 100/420 = 336 + 100/420 = 436/420 - 436/420 simplified gives 109/105
- So, 12/15 + 20/84 = 109/105
In mixed form: 14/105
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