Answers

Add 21/98 and 72/60

1^st number: 21/98, 2^nd number: 1 12/60

21/98 + 72/60 is 99/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 60 is 2940
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2940
2. For the 1st fraction, since 98 × 30 = 2940,
   21/98 = 21 × 30/98 × 30 = 630/2940
3. Likewise, for the 2nd fraction, since 60 × 49 = 2940,
   72/60 = 72 × 49/60 × 49 = 3528/2940
4. Add the two like fractions:
   630/2940 + 3528/2940 = 630 + 3528/2940 = 4158/2940
5. 4158/2940 simplified gives 99/70
6. So, 21/98 + 72/60 = 99/70
   In mixed form: 129/70

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