Add 20/21 and 80/6
1st number: 20/21, 2nd number: 13 2/6
20/21 + 80/6 is 100/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
20/21 = 20 × 2/21 × 2 = 40/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
80/6 = 80 × 7/6 × 7 = 560/42 - Add the two like fractions:
40/42 + 560/42 = 40 + 560/42 = 600/42 - 600/42 simplified gives 100/7
- So, 20/21 + 80/6 = 100/7
In mixed form: 142/7
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