Add 28/90 and 21/18
1st number: 28/90, 2nd number: 1 3/18
28/90 + 21/18 is 133/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
28/90 = 28 × 1/90 × 1 = 28/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Add the two like fractions:
28/90 + 105/90 = 28 + 105/90 = 133/90 - So, 28/90 + 21/18 = 133/90
In mixed form: 143/90
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