Add 90/15 and 5/20
1st number: 6 0/15, 2nd number: 5/20
90/15 + 5/20 is 25/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
90/15 = 90 × 4/15 × 4 = 360/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
5/20 = 5 × 3/20 × 3 = 15/60 - Add the two like fractions:
360/60 + 15/60 = 360 + 15/60 = 375/60 - 375/60 simplified gives 25/4
- So, 90/15 + 5/20 = 25/4
In mixed form: 61/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+10/20 90/30+5/20 90/15+5/40 90/15+15/20 90/45+5/20 90/15+5/60 90/15+25/20 90/75+5/20 90/15+35/20