Add 20/70 and 81/7
1st number: 20/70, 2nd number: 11 4/7
20/70 + 81/7 is 83/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
20/70 = 20 × 1/70 × 1 = 20/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
81/7 = 81 × 10/7 × 10 = 810/70 - Add the two like fractions:
20/70 + 810/70 = 20 + 810/70 = 830/70 - 830/70 simplified gives 83/7
- So, 20/70 + 81/7 = 83/7
In mixed form: 116/7
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