Add 21/2 and 90/15
1st number: 10 1/2, 2nd number: 6 0/15
21/2 + 90/15 is 33/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
21/2 = 21 × 15/2 × 15 = 315/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
90/15 = 90 × 2/15 × 2 = 180/30 - Add the two like fractions:
315/30 + 180/30 = 315 + 180/30 = 495/30 - 495/30 simplified gives 33/2
- So, 21/2 + 90/15 = 33/2
In mixed form: 161/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+90/15 21/4+90/15 21/2+90/30 63/2+90/15 21/6+90/15 21/2+90/45 21/10+90/15 21/2+90/75 21/14+90/15