Add 90/20 and 12/28
1st number: 4 10/20, 2nd number: 12/28
90/20 + 12/28 is 69/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
90/20 = 90 × 7/20 × 7 = 630/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
12/28 = 12 × 5/28 × 5 = 60/140 - Add the two like fractions:
630/140 + 60/140 = 630 + 60/140 = 690/140 - 690/140 simplified gives 69/14
- So, 90/20 + 12/28 = 69/14
In mixed form: 413/14
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