Add 70/20 and 42/27
1st number: 3 10/20, 2nd number: 1 15/27
70/20 + 42/27 is 91/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 27 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
70/20 = 70 × 27/20 × 27 = 1890/540 - Likewise, for the 2nd fraction, since 27 × 20 = 540,
42/27 = 42 × 20/27 × 20 = 840/540 - Add the two like fractions:
1890/540 + 840/540 = 1890 + 840/540 = 2730/540 - 2730/540 simplified gives 91/18
- So, 70/20 + 42/27 = 91/18
In mixed form: 51/18
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