Add 21/4 and 28/80
1st number: 5 1/4, 2nd number: 28/80
21/4 + 28/80 is 28/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
21/4 = 21 × 20/4 × 20 = 420/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
28/80 = 28 × 1/80 × 1 = 28/80 - Add the two like fractions:
420/80 + 28/80 = 420 + 28/80 = 448/80 - 448/80 simplified gives 28/5
- So, 21/4 + 28/80 = 28/5
In mixed form: 53/5
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