Add 80/42 and 15/40
1st number: 1 38/42, 2nd number: 15/40
80/42 + 15/40 is 383/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
80/42 = 80 × 20/42 × 20 = 1600/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
15/40 = 15 × 21/40 × 21 = 315/840 - Add the two like fractions:
1600/840 + 315/840 = 1600 + 315/840 = 1915/840 - 1915/840 simplified gives 383/168
- So, 80/42 + 15/40 = 383/168
In mixed form: 247/168
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