Add 28/16 and 90/15
1st number: 1 12/16, 2nd number: 6 0/15
28/16 + 90/15 is 31/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 15 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 16 × 15 = 240,
28/16 = 28 × 15/16 × 15 = 420/240 - Likewise, for the 2nd fraction, since 15 × 16 = 240,
90/15 = 90 × 16/15 × 16 = 1440/240 - Add the two like fractions:
420/240 + 1440/240 = 420 + 1440/240 = 1860/240 - 1860/240 simplified gives 31/4
- So, 28/16 + 90/15 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/16+90/15 28/32+90/15 28/16+90/30 84/16+90/15 28/48+90/15 28/16+90/45 28/80+90/15 28/16+90/75