Add 27/90 and 30/21
1st number: 27/90, 2nd number: 1 9/21
27/90 + 30/21 is 121/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
27/90 = 27 × 7/90 × 7 = 189/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
30/21 = 30 × 30/21 × 30 = 900/630 - Add the two like fractions:
189/630 + 900/630 = 189 + 900/630 = 1089/630 - 1089/630 simplified gives 121/70
- So, 27/90 + 30/21 = 121/70
In mixed form: 151/70
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