Answers

Add 70/63 and 12/40

1^st number: 1 7/63, 2^nd number: 12/40

70/63 + 12/40 is 127/90.

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,
   70/63 = 70 × 40/63 × 40 = 2800/2520
3. Likewise, for the 2nd fraction, since 40 × 63 = 2520,
   12/40 = 12 × 63/40 × 63 = 756/2520
4. Add the two like fractions:
   2800/2520 + 756/2520 = 2800 + 756/2520 = 3556/2520
5. 3556/2520 simplified gives 127/90
6. So, 70/63 + 12/40 = 127/90
   In mixed form: 137/90

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