Answers

Add 90/42 and 20/40

1^st number: 2 6/42, 2^nd number: 20/40

90/42 + 20/40 is 37/14.

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,
   20/40 = 20 × 21/40 × 21 = 420/840
4. Add the two like fractions:
   1800/840 + 420/840 = 1800 + 420/840 = 2220/840
5. 2220/840 simplified gives 37/14
6. So, 90/42 + 20/40 = 37/14
   In mixed form: 29/14

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