Add 90/20 and 90/28
1st number: 4 10/20, 2nd number: 3 6/28
90/20 + 90/28 is 54/7.
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,
90/28 = 90 × 5/28 × 5 = 450/140 - Add the two like fractions:
630/140 + 450/140 = 630 + 450/140 = 1080/140 - 1080/140 simplified gives 54/7
- So, 90/20 + 90/28 = 54/7
In mixed form: 75/7
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