Add 80/42 and 81/70
1st number: 1 38/42, 2nd number: 1 11/70
80/42 + 81/70 is 643/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
81/70 = 81 × 3/70 × 3 = 243/210 - Add the two like fractions:
400/210 + 243/210 = 400 + 243/210 = 643/210 - So, 80/42 + 81/70 = 643/210
In mixed form: 313/210
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