Answers

Add 72/63 and 2/40

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

72/63 + 2/40 is 167/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 40 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 63 × 40 = 2520,
   72/63 = 72 × 40/63 × 40 = 2880/2520
3. Likewise, for the 2nd fraction, since 40 × 63 = 2520,
   2/40 = 2 × 63/40 × 63 = 126/2520
4. Add the two like fractions:
   2880/2520 + 126/2520 = 2880 + 126/2520 = 3006/2520
5. 3006/2520 simplified gives 167/140
6. So, 72/63 + 2/40 = 167/140
   In mixed form: 127/140

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