Add 20/42 and 72/9
1st number: 20/42, 2nd number: 8 0/9
20/42 + 72/9 is 178/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
20/42 = 20 × 3/42 × 3 = 60/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
72/9 = 72 × 14/9 × 14 = 1008/126 - Add the two like fractions:
60/126 + 1008/126 = 60 + 1008/126 = 1068/126 - 1068/126 simplified gives 178/21
- So, 20/42 + 72/9 = 178/21
In mixed form: 810/21
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