Add 90/15 and 42/54
1st number: 6 0/15, 2nd number: 42/54
90/15 + 42/54 is 61/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 15 × 18 = 270,
90/15 = 90 × 18/15 × 18 = 1620/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
42/54 = 42 × 5/54 × 5 = 210/270 - Add the two like fractions:
1620/270 + 210/270 = 1620 + 210/270 = 1830/270 - 1830/270 simplified gives 61/9
- So, 90/15 + 42/54 = 61/9
In mixed form: 67/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+84/54 90/30+42/54 90/45+42/54 90/75+42/54