Add 20/15 and 90/27
1st number: 1 5/15, 2nd number: 3 9/27
20/15 + 90/27 is 14/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 15 × 9 = 135,
20/15 = 20 × 9/15 × 9 = 180/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
90/27 = 90 × 5/27 × 5 = 450/135 - Add the two like fractions:
180/135 + 450/135 = 180 + 450/135 = 630/135 - 630/135 simplified gives 14/3
- So, 20/15 + 90/27 = 14/3
In mixed form: 42/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+90/27 20/30+90/27 20/15+90/54 60/15+90/27 20/45+90/27 20/15+90/81 20/75+90/27