Add 9/4 and 45/15
1st number: 2 1/4, 2nd number: 3 0/15
9/4 + 45/15 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
9/4 = 9 × 15/4 × 15 = 135/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
45/15 = 45 × 4/15 × 4 = 180/60 - Add the two like fractions:
135/60 + 180/60 = 135 + 180/60 = 315/60 - 315/60 simplified gives 21/4
- So, 9/4 + 45/15 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/4+45/15 9/4+90/15 9/8+45/15 9/4+45/30 27/4+45/15 9/12+45/15 45/4+45/15 9/20+45/15 9/4+45/75 63/4+45/15 9/28+45/15