Add 28/21 and 70/18
1st number: 1 7/21, 2nd number: 3 16/18
28/21 + 70/18 is 47/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
28/21 = 28 × 6/21 × 6 = 168/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126 - Add the two like fractions:
168/126 + 490/126 = 168 + 490/126 = 658/126 - 658/126 simplified gives 47/9
- So, 28/21 + 70/18 = 47/9
In mixed form: 52/9
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