Add 20/16 and 90/15
1st number: 1 4/16, 2nd number: 6 0/15
20/16 + 90/15 is 29/4.
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,
20/16 = 20 × 15/16 × 15 = 300/240 - Likewise, for the 2nd fraction, since 15 × 16 = 240,
90/15 = 90 × 16/15 × 16 = 1440/240 - Add the two like fractions:
300/240 + 1440/240 = 300 + 1440/240 = 1740/240 - 1740/240 simplified gives 29/4
- So, 20/16 + 90/15 = 29/4
In mixed form: 71/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/16+90/15 20/32+90/15 20/16+90/30 60/16+90/15 20/48+90/15 20/16+90/45 20/80+90/15 20/16+90/75