Add 15/20 and 72/7
1st number: 15/20, 2nd number: 10 2/7
15/20 + 72/7 is 309/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
15/20 = 15 × 7/20 × 7 = 105/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
72/7 = 72 × 20/7 × 20 = 1440/140 - Add the two like fractions:
105/140 + 1440/140 = 105 + 1440/140 = 1545/140 - 1545/140 simplified gives 309/28
- So, 15/20 + 72/7 = 309/28
In mixed form: 111/28
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