Answers

Add 54/80 and 90/56

1^st number: 54/80, 2^nd number: 1 34/56

54/80 + 90/56 is 639/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 56 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 80 × 7 = 560,
   54/80 = 54 × 7/80 × 7 = 378/560
3. Likewise, for the 2nd fraction, since 56 × 10 = 560,
   90/56 = 90 × 10/56 × 10 = 900/560
4. Add the two like fractions:
   378/560 + 900/560 = 378 + 900/560 = 1278/560
5. 1278/560 simplified gives 639/280
6. So, 54/80 + 90/56 = 639/280
   In mixed form: 279/280

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

Add Fractions Calculator