Add 21/15 and 90/4
1st number: 1 6/15, 2nd number: 22 2/4
21/15 + 90/4 is 239/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
21/15 = 21 × 4/15 × 4 = 84/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
90/4 = 90 × 15/4 × 15 = 1350/60 - Add the two like fractions:
84/60 + 1350/60 = 84 + 1350/60 = 1434/60 - 1434/60 simplified gives 239/10
- So, 21/15 + 90/4 = 239/10
In mixed form: 239/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+90/4 21/30+90/4 21/15+90/8 63/15+90/4 21/45+90/4 21/15+90/12 21/75+90/4 21/15+90/20 21/15+90/28