Add 3/42 and 81/80
1st number: 3/42, 2nd number: 1 1/80
3/42 + 81/80 is 607/560.
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,
3/42 = 3 × 40/42 × 40 = 120/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
81/80 = 81 × 21/80 × 21 = 1701/1680 - Add the two like fractions:
120/1680 + 1701/1680 = 120 + 1701/1680 = 1821/1680 - 1821/1680 simplified gives 607/560
- So, 3/42 + 81/80 = 607/560
In mixed form: 147/560
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