Add 80/70 and 42/18
1st number: 1 10/70, 2nd number: 2 6/18
80/70 + 42/18 is 73/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
80/70 = 80 × 9/70 × 9 = 720/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
42/18 = 42 × 35/18 × 35 = 1470/630 - Add the two like fractions:
720/630 + 1470/630 = 720 + 1470/630 = 2190/630 - 2190/630 simplified gives 73/21
- So, 80/70 + 42/18 = 73/21
In mixed form: 310/21
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