Add 18/70 and 21/18
1st number: 18/70, 2nd number: 1 3/18
18/70 + 21/18 is 299/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
21/18 = 21 × 35/18 × 35 = 735/630 - Add the two like fractions:
162/630 + 735/630 = 162 + 735/630 = 897/630 - 897/630 simplified gives 299/210
- So, 18/70 + 21/18 = 299/210
In mixed form: 189/210
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