Answers

Add 21/60 and 45/28

1^st number: 21/60, 2^nd number: 1 17/28

21/60 + 45/28 is 137/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 28 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 60 × 7 = 420,
   21/60 = 21 × 7/60 × 7 = 147/420
3. Likewise, for the 2nd fraction, since 28 × 15 = 420,
   45/28 = 45 × 15/28 × 15 = 675/420
4. Add the two like fractions:
   147/420 + 675/420 = 147 + 675/420 = 822/420
5. 822/420 simplified gives 137/70
6. So, 21/60 + 45/28 = 137/70
   In mixed form: 167/70

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