Answers

Add 56/63 and 3/80

56/63 + 3/80 is 667/720.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 80 is 5040
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5040
2. For the 1st fraction, since 63 × 80 = 5040,
   56/63 = 56 × 80/63 × 80 = 4480/5040
3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
   3/80 = 3 × 63/80 × 63 = 189/5040
4. Add the two like fractions:
   4480/5040 + 189/5040 = 4480 + 189/5040 = 4669/5040
5. 4669/5040 simplified gives 667/720
6. So, 56/63 + 3/80 = 667/720

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