Add 12/42 and 45/40
1st number: 12/42, 2nd number: 1 5/40
12/42 + 45/40 is 79/56.
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,
12/42 = 12 × 20/42 × 20 = 240/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
45/40 = 45 × 21/40 × 21 = 945/840 - Add the two like fractions:
240/840 + 945/840 = 240 + 945/840 = 1185/840 - 1185/840 simplified gives 79/56
- So, 12/42 + 45/40 = 79/56
In mixed form: 123/56
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