Answers

Add 63/56 and 72/80

1^st number: 1 7/56, 2^nd number: 72/80

63/56 + 72/80 is 81/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 56 × 10 = 560,
   63/56 = 63 × 10/56 × 10 = 630/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   72/80 = 72 × 7/80 × 7 = 504/560
4. Add the two like fractions:
   630/560 + 504/560 = 630 + 504/560 = 1134/560
5. 1134/560 simplified gives 81/40
6. So, 63/56 + 72/80 = 81/40
   In mixed form: 21/40

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