Add 90/20 and 4/15
1st number: 4 10/20, 2nd number: 4/15
90/20 + 4/15 is 143/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
90/20 = 90 × 3/20 × 3 = 270/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
4/15 = 4 × 4/15 × 4 = 16/60 - Add the two like fractions:
270/60 + 16/60 = 270 + 16/60 = 286/60 - 286/60 simplified gives 143/30
- So, 90/20 + 4/15 = 143/30
In mixed form: 423/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+8/15 90/40+4/15 90/20+4/30 90/20+12/15 90/60+4/15 90/20+4/45 90/20+20/15 90/20+4/75 90/20+28/15