Add 63/12 and 90/15
1st number: 5 3/12, 2nd number: 6 0/15
63/12 + 90/15 is 45/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
63/12 = 63 × 5/12 × 5 = 315/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
90/15 = 90 × 4/15 × 4 = 360/60 - Add the two like fractions:
315/60 + 360/60 = 315 + 360/60 = 675/60 - 675/60 simplified gives 45/4
- So, 63/12 + 90/15 = 45/4
In mixed form: 111/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/24+90/15 63/12+90/30 63/36+90/15 63/12+90/45 63/60+90/15 63/12+90/75 63/84+90/15