Add 28/90 and 12/15
28/90 + 12/15 is 10/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 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 15 × 6 = 90,
12/15 = 12 × 6/15 × 6 = 72/90 - Add the two like fractions:
28/90 + 72/90 = 28 + 72/90 = 100/90 - 100/90 simplified gives 10/9
- So, 28/90 + 12/15 = 10/9
In mixed form: 11/9
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