Add 15/21 and 9/30
15/21 + 9/30 is 71/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
15/21 = 15 × 10/21 × 10 = 150/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
9/30 = 9 × 7/30 × 7 = 63/210 - Add the two like fractions:
150/210 + 63/210 = 150 + 63/210 = 213/210 - 213/210 simplified gives 71/70
- So, 15/21 + 9/30 = 71/70
In mixed form: 11/70
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