Add 72/7 and 28/20
1st number: 10 2/7, 2nd number: 1 8/20
72/7 + 28/20 is 409/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
72/7 = 72 × 20/7 × 20 = 1440/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
28/20 = 28 × 7/20 × 7 = 196/140 - Add the two like fractions:
1440/140 + 196/140 = 1440 + 196/140 = 1636/140 - 1636/140 simplified gives 409/35
- So, 72/7 + 28/20 = 409/35
In mixed form: 1124/35
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