Add 28/90 and 54/7
1st number: 28/90, 2nd number: 7 5/7
28/90 + 54/7 is 2528/315.
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,
28/90 = 28 × 7/90 × 7 = 196/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
54/7 = 54 × 90/7 × 90 = 4860/630 - Add the two like fractions:
196/630 + 4860/630 = 196 + 4860/630 = 5056/630 - 5056/630 simplified gives 2528/315
- So, 28/90 + 54/7 = 2528/315
In mixed form: 88/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90+54/7 28/90+54/14 84/90+54/7 28/90+54/21 28/90+54/35 28/90+54/49