Answers

Add 3/80 and 72/63

1^st number: 3/80, 2^nd number: 1 9/63

3/80 + 72/63 is 661/560.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 63 is 5040
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5040
2. For the 1st fraction, since 80 × 63 = 5040,
   3/80 = 3 × 63/80 × 63 = 189/5040
3. Likewise, for the 2nd fraction, since 63 × 80 = 5040,
   72/63 = 72 × 80/63 × 80 = 5760/5040
4. Add the two like fractions:
   189/5040 + 5760/5040 = 189 + 5760/5040 = 5949/5040
5. 5949/5040 simplified gives 661/560
6. So, 3/80 + 72/63 = 661/560
   In mixed form: 1101/560

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