Answers

Add 90/42 and 64/40

1^st number: 2 6/42, 2^nd number: 1 24/40

90/42 + 64/40 is 131/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   90/42 = 90 × 20/42 × 20 = 1800/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   64/40 = 64 × 21/40 × 21 = 1344/840
4. Add the two like fractions:
   1800/840 + 1344/840 = 1800 + 1344/840 = 3144/840
5. 3144/840 simplified gives 131/35
6. So, 90/42 + 64/40 = 131/35
   In mixed form: 326/35

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