Add 28/18 and 4/20
1st number: 1 10/18, 2nd number: 4/20
28/18 + 4/20 is 79/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
28/18 = 28 × 10/18 × 10 = 280/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
4/20 = 4 × 9/20 × 9 = 36/180 - Add the two like fractions:
280/180 + 36/180 = 280 + 36/180 = 316/180 - 316/180 simplified gives 79/45
- So, 28/18 + 4/20 = 79/45
In mixed form: 134/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+4/20 28/18+8/20 28/36+4/20 28/18+4/40 84/18+4/20 28/18+12/20 28/54+4/20 28/18+4/60 28/90+4/20 28/18+28/20