Answers

Add 42/35 and 21/60

1^st number: 1 7/35, 2^nd number: 21/60

42/35 + 21/60 is 31/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 35 × 12 = 420,
   42/35 = 42 × 12/35 × 12 = 504/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   21/60 = 21 × 7/60 × 7 = 147/420
4. Add the two like fractions:
   504/420 + 147/420 = 504 + 147/420 = 651/420
5. 651/420 simplified gives 31/20
6. So, 42/35 + 21/60 = 31/20
   In mixed form: 111/20

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