Add 90/20 and 18/28
1st number: 4 10/20, 2nd number: 18/28
90/20 + 18/28 is 36/7.
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,
18/28 = 18 × 5/28 × 5 = 90/140 - Add the two like fractions:
630/140 + 90/140 = 630 + 90/140 = 720/140 - 720/140 simplified gives 36/7
- So, 90/20 + 18/28 = 36/7
In mixed form: 51/7
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