Answers

Subtract 56/20 from 21/30

1^st number: 21/30, 2^nd number: 2 16/20

21/30 - 56/20 is -21/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 20 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 30 × 2 = 60,
   21/30 = 21 × 2/30 × 2 = 42/60
3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
   56/20 = 56 × 3/20 × 3 = 168/60
4. Subtract the two like fractions:
   42/60 - 168/60 = 42 - 168/60 = -126/60
5. After reducing the fraction, the answer is -21/10

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