Add 54/90 and 42/7
1st number: 54/90, 2nd number: 6 0/7
54/90 + 42/7 is 33/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
54/90 = 54 × 7/90 × 7 = 378/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
42/7 = 42 × 90/7 × 90 = 3780/630 - Add the two like fractions:
378/630 + 3780/630 = 378 + 3780/630 = 4158/630 - 4158/630 simplified gives 33/5
- So, 54/90 + 42/7 = 33/5
In mixed form: 63/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90+84/7 54/90+42/14 54/90+42/21 54/90+42/35 54/90+42/49