Add 18/21 and 7/10
18/21 + 7/10 is 109/70.
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,
18/21 = 18 × 10/21 × 10 = 180/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210 - Add the two like fractions:
180/210 + 147/210 = 180 + 147/210 = 327/210 - 327/210 simplified gives 109/70
- So, 18/21 + 7/10 = 109/70
In mixed form: 139/70
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