Answers

Subtract 20/63 from 15/40

15/40 - 20/63 is 29/504.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 63 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 40 × 63 = 2520,
   15/40 = 15 × 63/40 × 63 = 945/2520
3. Likewise, for the 2nd fraction, since 63 × 40 = 2520,
   20/63 = 20 × 40/63 × 40 = 800/2520
4. Subtract the two like fractions:
   945/2520 - 800/2520 = 945 - 800/2520 = 145/2520
5. After reducing the fraction, the answer is 29/504

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