Answers

Add 10/63 and 70/80

10/63 + 70/80 is 521/504.

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,
   10/63 = 10 × 80/63 × 80 = 800/5040
3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
   70/80 = 70 × 63/80 × 63 = 4410/5040
4. Add the two like fractions:
   800/5040 + 4410/5040 = 800 + 4410/5040 = 5210/5040
5. 5210/5040 simplified gives 521/504
6. So, 10/63 + 70/80 = 521/504
   In mixed form: 117/504

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