Add 4/21 and 90/15
1st number: 4/21, 2nd number: 6 0/15
4/21 + 90/15 is 130/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
90/15 = 90 × 7/15 × 7 = 630/105 - Add the two like fractions:
20/105 + 630/105 = 20 + 630/105 = 650/105 - 650/105 simplified gives 130/21
- So, 4/21 + 90/15 = 130/21
In mixed form: 64/21
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