Add 28/80 and 90/75
1st number: 28/80, 2nd number: 1 15/75
28/80 + 90/75 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 75 is 1200
Next, find the equivalent fraction of both fractional numbers with denominator 1200 - For the 1st fraction, since 80 × 15 = 1200,
28/80 = 28 × 15/80 × 15 = 420/1200 - Likewise, for the 2nd fraction, since 75 × 16 = 1200,
90/75 = 90 × 16/75 × 16 = 1440/1200 - Add the two like fractions:
420/1200 + 1440/1200 = 420 + 1440/1200 = 1860/1200 - 1860/1200 simplified gives 31/20
- So, 28/80 + 90/75 = 31/20
In mixed form: 111/20
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