Answers

Add 15/40 and 72/63

1^st number: 15/40, 2^nd number: 1 9/63

15/40 + 72/63 is 85/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 63 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 40 × 63 = 2520,
   15/40 = 15 × 63/40 × 63 = 945/2520
3. Likewise, for the 2nd fraction, since 63 × 40 = 2520,
   72/63 = 72 × 40/63 × 40 = 2880/2520
4. Add the two like fractions:
   945/2520 + 2880/2520 = 945 + 2880/2520 = 3825/2520
5. 3825/2520 simplified gives 85/56
6. So, 15/40 + 72/63 = 85/56
   In mixed form: 129/56

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