Answers

Add 81/40 and 90/63

1^st number: 2 1/40, 2^nd number: 1 27/63

81/40 + 90/63 is 967/280.

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,
   81/40 = 81 × 63/40 × 63 = 5103/2520
3. Likewise, for the 2nd fraction, since 63 × 40 = 2520,
   90/63 = 90 × 40/63 × 40 = 3600/2520
4. Add the two like fractions:
   5103/2520 + 3600/2520 = 5103 + 3600/2520 = 8703/2520
5. 8703/2520 simplified gives 967/280
6. So, 81/40 + 90/63 = 967/280
   In mixed form: 3127/280

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