Answers

Add 42/70 and 45/24

1^st number: 42/70, 2^nd number: 1 21/24

42/70 + 45/24 is 99/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 24 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 70 × 12 = 840,
   42/70 = 42 × 12/70 × 12 = 504/840
3. Likewise, for the 2nd fraction, since 24 × 35 = 840,
   45/24 = 45 × 35/24 × 35 = 1575/840
4. Add the two like fractions:
   504/840 + 1575/840 = 504 + 1575/840 = 2079/840
5. 2079/840 simplified gives 99/40
6. So, 42/70 + 45/24 = 99/40
   In mixed form: 219/40

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