Answers

Subtract 84/63 from 40/45

1^st number: 40/45, 2^nd number: 1 21/63

40/45 - 84/63 is -4/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 63 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 45 × 7 = 315,
   40/45 = 40 × 7/45 × 7 = 280/315
3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
   84/63 = 84 × 5/63 × 5 = 420/315
4. Subtract the two like fractions:
   280/315 - 420/315 = 280 - 420/315 = -140/315
5. After reducing the fraction, the answer is -4/9

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