Answers

Add 45/63 and 56/80

45/63 + 56/80 is 99/70.

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,
   45/63 = 45 × 80/63 × 80 = 3600/5040
3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
   56/80 = 56 × 63/80 × 63 = 3528/5040
4. Add the two like fractions:
   3600/5040 + 3528/5040 = 3600 + 3528/5040 = 7128/5040
5. 7128/5040 simplified gives 99/70
6. So, 45/63 + 56/80 = 99/70
   In mixed form: 129/70

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