Answers

Add 21/42 and 45/49

21/42 + 45/49 is 139/98.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 49 is 294
   
   Next, find the equivalent fraction of both fractional numbers with denominator 294
2. For the 1st fraction, since 42 × 7 = 294,
   21/42 = 21 × 7/42 × 7 = 147/294
3. Likewise, for the 2nd fraction, since 49 × 6 = 294,
   45/49 = 45 × 6/49 × 6 = 270/294
4. Add the two like fractions:
   147/294 + 270/294 = 147 + 270/294 = 417/294
5. 417/294 simplified gives 139/98
6. So, 21/42 + 45/49 = 139/98
   In mixed form: 141/98

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