Add 90/27 and 42/20
1st number: 3 9/27, 2nd number: 2 2/20
90/27 + 42/20 is 163/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
90/27 = 90 × 20/27 × 20 = 1800/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
42/20 = 42 × 27/20 × 27 = 1134/540 - Add the two like fractions:
1800/540 + 1134/540 = 1800 + 1134/540 = 2934/540 - 2934/540 simplified gives 163/30
- So, 90/27 + 42/20 = 163/30
In mixed form: 513/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/27+84/20 90/54+42/20 90/27+42/40 90/81+42/20 90/27+42/60