Add 81/20 and 15/28
1st number: 4 1/20, 2nd number: 15/28
81/20 + 15/28 is 321/70.
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,
81/20 = 81 × 7/20 × 7 = 567/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
15/28 = 15 × 5/28 × 5 = 75/140 - Add the two like fractions:
567/140 + 75/140 = 567 + 75/140 = 642/140 - 642/140 simplified gives 321/70
- So, 81/20 + 15/28 = 321/70
In mixed form: 441/70
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