Add 20/70 and 90/12
1st number: 20/70, 2nd number: 7 6/12
20/70 + 90/12 is 109/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
20/70 = 20 × 6/70 × 6 = 120/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
90/12 = 90 × 35/12 × 35 = 3150/420 - Add the two like fractions:
120/420 + 3150/420 = 120 + 3150/420 = 3270/420 - 3270/420 simplified gives 109/14
- So, 20/70 + 90/12 = 109/14
In mixed form: 711/14
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