Subtract 90/63 from 45/24, Solve 1 21/24

Subtract 90/63 from 45/24

1^st number: 1 21/24, 2^nd number: 1 27/63

45/24 - 90/63 is 25/56.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 63 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 24 × 21 = 504,
45/24 = 45 × 21/24 × 21 = 945/504
Likewise, for the 2nd fraction, since 63 × 8 = 504,
90/63 = 90 × 8/63 × 8 = 720/504
Subtract the two like fractions:
945/504 - 720/504 = 945 - 720/504 = 225/504
After reducing the fraction, the answer is 25/56

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