Add 30/42 and 80/40
1st number: 30/42, 2nd number: 2 0/40
30/42 + 80/40 is 19/7.
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,
30/42 = 30 × 20/42 × 20 = 600/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
80/40 = 80 × 21/40 × 21 = 1680/840 - Add the two like fractions:
600/840 + 1680/840 = 600 + 1680/840 = 2280/840 - 2280/840 simplified gives 19/7
- So, 30/42 + 80/40 = 19/7
In mixed form: 25/7
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