Add 18/15 and 42/80
1st number: 1 3/15, 2nd number: 42/80
18/15 + 42/80 is 69/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
18/15 = 18 × 16/15 × 16 = 288/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
42/80 = 42 × 3/80 × 3 = 126/240 - Add the two like fractions:
288/240 + 126/240 = 288 + 126/240 = 414/240 - 414/240 simplified gives 69/40
- So, 18/15 + 42/80 = 69/40
In mixed form: 129/40
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