Add 90/15 and 4/20
1st number: 6 0/15, 2nd number: 4/20
90/15 + 4/20 is 31/5.
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,
4/20 = 4 × 3/20 × 3 = 12/60 - Add the two like fractions:
360/60 + 12/60 = 360 + 12/60 = 372/60 - 372/60 simplified gives 31/5
- So, 90/15 + 4/20 = 31/5
In mixed form: 61/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+8/20 90/30+4/20 90/15+4/40 90/15+12/20 90/45+4/20 90/15+4/60 90/75+4/20 90/15+28/20