Add 28/84 and 90/35
1st number: 28/84, 2nd number: 2 20/35
28/84 + 90/35 is 61/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
28/84 = 28 × 5/84 × 5 = 140/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
90/35 = 90 × 12/35 × 12 = 1080/420 - Add the two like fractions:
140/420 + 1080/420 = 140 + 1080/420 = 1220/420 - 1220/420 simplified gives 61/21
- So, 28/84 + 90/35 = 61/21
In mixed form: 219/21
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