Answers

Subtract 21/32 from 21/40

21/40 - 21/32 is -21/160.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 32 is 160
   
   Next, find the equivalent fraction of both fractional numbers with denominator 160
2. For the 1st fraction, since 40 × 4 = 160,
   21/40 = 21 × 4/40 × 4 = 84/160
3. Likewise, for the 2nd fraction, since 32 × 5 = 160,
   21/32 = 21 × 5/32 × 5 = 105/160
4. Subtract the two like fractions:
   84/160 - 105/160 = 84 - 105/160 = -21/160

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