Add 54/45 and 81/42
1st number: 1 9/45, 2nd number: 1 39/42
54/45 + 81/42 is 219/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
54/45 = 54 × 14/45 × 14 = 756/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
81/42 = 81 × 15/42 × 15 = 1215/630 - Add the two like fractions:
756/630 + 1215/630 = 756 + 1215/630 = 1971/630 - 1971/630 simplified gives 219/70
- So, 54/45 + 81/42 = 219/70
In mixed form: 39/70
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