Add 20/42 and 70/27
1st number: 20/42, 2nd number: 2 16/27
20/42 + 70/27 is 580/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
20/42 = 20 × 9/42 × 9 = 180/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
70/27 = 70 × 14/27 × 14 = 980/378 - Add the two like fractions:
180/378 + 980/378 = 180 + 980/378 = 1160/378 - 1160/378 simplified gives 580/189
- So, 20/42 + 70/27 = 580/189
In mixed form: 313/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+70/27 20/84+70/27 20/42+70/54 60/42+70/27 20/42+70/81