Add 90/70 and 12/28
1st number: 1 20/70, 2nd number: 12/28
90/70 + 12/28 is 12/7.
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,
90/70 = 90 × 2/70 × 2 = 180/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
12/28 = 12 × 5/28 × 5 = 60/140 - Add the two like fractions:
180/140 + 60/140 = 180 + 60/140 = 240/140 - 240/140 simplified gives 12/7
- So, 90/70 + 12/28 = 12/7
In mixed form: 15/7
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