Add 3/10 and 18/21
3/10 + 18/21 is 81/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
3/10 = 3 × 21/10 × 21 = 63/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Add the two like fractions:
63/210 + 180/210 = 63 + 180/210 = 243/210 - 243/210 simplified gives 81/70
- So, 3/10 + 18/21 = 81/70
In mixed form: 111/70
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