Add 9/28 and 90/70
1st number: 9/28, 2nd number: 1 20/70
9/28 + 90/70 is 45/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
9/28 = 9 × 5/28 × 5 = 45/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
90/70 = 90 × 2/70 × 2 = 180/140 - Add the two like fractions:
45/140 + 180/140 = 45 + 180/140 = 225/140 - 225/140 simplified gives 45/28
- So, 9/28 + 90/70 = 45/28
In mixed form: 117/28
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