Add 18/42 and 81/80
1st number: 18/42, 2nd number: 1 1/80
18/42 + 81/80 is 807/560.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
18/42 = 18 × 40/42 × 40 = 720/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
81/80 = 81 × 21/80 × 21 = 1701/1680 - Add the two like fractions:
720/1680 + 1701/1680 = 720 + 1701/1680 = 2421/1680 - 2421/1680 simplified gives 807/560
- So, 18/42 + 81/80 = 807/560
In mixed form: 1247/560
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