Subtract 18/45 from 24/21, Solve 1 3/21

Subtract 18/45 from 24/21

1^st number: 1 3/21, 2^nd number: 18/45

24/21 - 18/45 is 26/35.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 21 × 15 = 315,
24/21 = 24 × 15/21 × 15 = 360/315
Likewise, for the 2nd fraction, since 45 × 7 = 315,
18/45 = 18 × 7/45 × 7 = 126/315
Subtract the two like fractions:
360/315 - 126/315 = 360 - 126/315 = 234/315
After reducing the fraction, the answer is 26/35

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