Add 9/20 and 81/28
1st number: 9/20, 2nd number: 2 25/28
9/20 + 81/28 is 117/35.
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,
9/20 = 9 × 7/20 × 7 = 63/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
81/28 = 81 × 5/28 × 5 = 405/140 - Add the two like fractions:
63/140 + 405/140 = 63 + 405/140 = 468/140 - 468/140 simplified gives 117/35
- So, 9/20 + 81/28 = 117/35
In mixed form: 312/35
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