Answers

Add 42/15 and 56/40

1^st number: 2 12/15, 2^nd number: 1 16/40

42/15 + 56/40 is 21/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 15 × 8 = 120,
   42/15 = 42 × 8/15 × 8 = 336/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   56/40 = 56 × 3/40 × 3 = 168/120
4. Add the two like fractions:
   336/120 + 168/120 = 336 + 168/120 = 504/120
5. 504/120 simplified gives 21/5
6. So, 42/15 + 56/40 = 21/5
   In mixed form: 41/5

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