Add 90/21 and 15/10
1st number: 4 6/21, 2nd number: 1 5/10
90/21 + 15/10 is 81/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
90/21 = 90 × 10/21 × 10 = 900/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
15/10 = 15 × 21/10 × 21 = 315/210 - Add the two like fractions:
900/210 + 315/210 = 900 + 315/210 = 1215/210 - 1215/210 simplified gives 81/14
- So, 90/21 + 15/10 = 81/14
In mixed form: 511/14
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