Answers

Subtract 90/20 from 7/30

1^st number: 7/30, 2^nd number: 4 10/20

7/30 - 90/20 is -64/15.

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,
   7/30 = 7 × 2/30 × 2 = 14/60
3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
   90/20 = 90 × 3/20 × 3 = 270/60
4. Subtract the two like fractions:
   14/60 - 270/60 = 14 - 270/60 = -256/60
5. After reducing the fraction, the answer is -64/15

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