Answers

Add 98/21 and 21/45

1^st number: 4 14/21, 2^nd number: 21/45

98/21 + 21/45 is 77/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 45 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 21 × 15 = 315,
   98/21 = 98 × 15/21 × 15 = 1470/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
   21/45 = 21 × 7/45 × 7 = 147/315
4. Add the two like fractions:
   1470/315 + 147/315 = 1470 + 147/315 = 1617/315
5. 1617/315 simplified gives 77/15
6. So, 98/21 + 21/45 = 77/15
   In mixed form: 52/15

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