Add 90/20 and 7/28
1st number: 4 10/20, 2nd number: 7/28
90/20 + 7/28 is 19/4.
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,
7/28 = 7 × 5/28 × 5 = 35/140 - Add the two like fractions:
630/140 + 35/140 = 630 + 35/140 = 665/140 - 665/140 simplified gives 19/4
- So, 90/20 + 7/28 = 19/4
In mixed form: 43/4
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