Answers

Add 56/21 and 42/40

1^st number: 2 14/21, 2^nd number: 1 2/40

56/21 + 42/40 is 223/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 21 × 40 = 840,
   56/21 = 56 × 40/21 × 40 = 2240/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   42/40 = 42 × 21/40 × 21 = 882/840
4. Add the two like fractions:
   2240/840 + 882/840 = 2240 + 882/840 = 3122/840
5. 3122/840 simplified gives 223/60
6. So, 56/21 + 42/40 = 223/60
   In mixed form: 343/60

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