Add 81/70 and 90/28
1st number: 1 11/70, 2nd number: 3 6/28
81/70 + 90/28 is 153/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
81/70 = 81 × 2/70 × 2 = 162/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Add the two like fractions:
162/140 + 450/140 = 162 + 450/140 = 612/140 - 612/140 simplified gives 153/35
- So, 81/70 + 90/28 = 153/35
In mixed form: 413/35
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