Add 27/28 and 70/40
1st number: 27/28, 2nd number: 1 30/40
27/28 + 70/40 is 19/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
27/28 = 27 × 10/28 × 10 = 270/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
70/40 = 70 × 7/40 × 7 = 490/280 - Add the two like fractions:
270/280 + 490/280 = 270 + 490/280 = 760/280 - 760/280 simplified gives 19/7
- So, 27/28 + 70/40 = 19/7
In mixed form: 25/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/28+70/40 27/56+70/40 27/28+70/80 81/28+70/40 27/84+70/40