Add 27/28 and 45/40
1st number: 27/28, 2nd number: 1 5/40
27/28 + 45/40 is 117/56.
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,
45/40 = 45 × 7/40 × 7 = 315/280 - Add the two like fractions:
270/280 + 315/280 = 270 + 315/280 = 585/280 - 585/280 simplified gives 117/56
- So, 27/28 + 45/40 = 117/56
In mixed form: 25/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/28+45/40 27/28+90/40 27/56+45/40 27/28+45/80 81/28+45/40 27/84+45/40