Answers

Subtract 98/64 from 21/20

1^st number: 1 1/20, 2^nd number: 1 34/64

21/20 - 98/64 is -77/160.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 64 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 20 × 16 = 320,
   21/20 = 21 × 16/20 × 16 = 336/320
3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
   98/64 = 98 × 5/64 × 5 = 490/320
4. Subtract the two like fractions:
   336/320 - 490/320 = 336 - 490/320 = -154/320
5. After reducing the fraction, the answer is -77/160

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