Add 70/20 and 80/42
1st number: 3 10/20, 2nd number: 1 38/42
70/20 + 80/42 is 227/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
70/20 = 70 × 21/20 × 21 = 1470/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
80/42 = 80 × 10/42 × 10 = 800/420 - Add the two like fractions:
1470/420 + 800/420 = 1470 + 800/420 = 2270/420 - 2270/420 simplified gives 227/42
- So, 70/20 + 80/42 = 227/42
In mixed form: 517/42
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