Answers

Subtract 21/8 from 7/30

1^st number: 7/30, 2^nd number: 2 5/8

7/30 - 21/8 is -287/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 8 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 30 × 4 = 120,
   7/30 = 7 × 4/30 × 4 = 28/120
3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
   21/8 = 21 × 15/8 × 15 = 315/120
4. Subtract the two like fractions:
   28/120 - 315/120 = 28 - 315/120 = -287/120

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