Add 28/4 and 90/20
1st number: 7 0/4, 2nd number: 4 10/20
28/4 + 90/20 is 23/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
28/4 = 28 × 5/4 × 5 = 140/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
90/20 = 90 × 1/20 × 1 = 90/20 - Add the two like fractions:
140/20 + 90/20 = 140 + 90/20 = 230/20 - 230/20 simplified gives 23/2
- So, 28/4 + 90/20 = 23/2
In mixed form: 111/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4+90/20 28/8+90/20 28/4+90/40 84/4+90/20 28/12+90/20 28/4+90/60 28/20+90/20