Answers

Add 25/63 and 70/80

25/63 + 70/80 is 641/504.

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,
   25/63 = 25 × 80/63 × 80 = 2000/5040
3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
   70/80 = 70 × 63/80 × 63 = 4410/5040
4. Add the two like fractions:
   2000/5040 + 4410/5040 = 2000 + 4410/5040 = 6410/5040
5. 6410/5040 simplified gives 641/504
6. So, 25/63 + 70/80 = 641/504
   In mixed form: 1137/504

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