Answers

Add 81/20 and 70/63

1^st number: 4 1/20, 2^nd number: 1 7/63

81/20 + 70/63 is 929/180.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 63 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 20 × 63 = 1260,
   81/20 = 81 × 63/20 × 63 = 5103/1260
3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
   70/63 = 70 × 20/63 × 20 = 1400/1260
4. Add the two like fractions:
   5103/1260 + 1400/1260 = 5103 + 1400/1260 = 6503/1260
5. 6503/1260 simplified gives 929/180
6. So, 81/20 + 70/63 = 929/180
   In mixed form: 529/180

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