Add 27/42 and 70/40
1st number: 27/42, 2nd number: 1 30/40
27/42 + 70/40 is 67/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
27/42 = 27 × 20/42 × 20 = 540/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
70/40 = 70 × 21/40 × 21 = 1470/840 - Add the two like fractions:
540/840 + 1470/840 = 540 + 1470/840 = 2010/840 - 2010/840 simplified gives 67/28
- So, 27/42 + 70/40 = 67/28
In mixed form: 211/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+70/40 27/84+70/40 27/42+70/80 81/42+70/40