Answers

Add 21/8 and 42/60

1^st number: 2 5/8, 2^nd number: 42/60

21/8 + 42/60 is 133/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 60 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 8 × 15 = 120,
   21/8 = 21 × 15/8 × 15 = 315/120
3. Likewise, for the 2nd fraction, since 60 × 2 = 120,
   42/60 = 42 × 2/60 × 2 = 84/120
4. Add the two like fractions:
   315/120 + 84/120 = 315 + 84/120 = 399/120
5. 399/120 simplified gives 133/40
6. So, 21/8 + 42/60 = 133/40
   In mixed form: 313/40

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