Add 28/14 and 45/40
1st number: 2 0/14, 2nd number: 1 5/40
28/14 + 45/40 is 25/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 14 × 20 = 280,
28/14 = 28 × 20/14 × 20 = 560/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
45/40 = 45 × 7/40 × 7 = 315/280 - Add the two like fractions:
560/280 + 315/280 = 560 + 315/280 = 875/280 - 875/280 simplified gives 25/8
- So, 28/14 + 45/40 = 25/8
In mixed form: 31/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/14+45/40 28/14+90/40 28/14+45/80 84/14+45/40 28/42+45/40 28/70+45/40 28/98+45/40