Answers

Add 90/20 and 72/98

1^st number: 4 10/20, 2^nd number: 72/98

90/20 + 72/98 is 513/98.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 98 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 20 × 49 = 980,
   90/20 = 90 × 49/20 × 49 = 4410/980
3. Likewise, for the 2nd fraction, since 98 × 10 = 980,
   72/98 = 72 × 10/98 × 10 = 720/980
4. Add the two like fractions:
   4410/980 + 720/980 = 4410 + 720/980 = 5130/980
5. 5130/980 simplified gives 513/98
6. So, 90/20 + 72/98 = 513/98
   In mixed form: 523/98

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