Subtract 48/5 from 45/21, Solve 2 3/21

Subtract 48/5 from 45/21

1^st number: 2 3/21, 2^nd number: 9 3/5

45/21 - 48/5 is -261/35.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 21 × 5 = 105,
45/21 = 45 × 5/21 × 5 = 225/105
Likewise, for the 2nd fraction, since 5 × 21 = 105,
48/5 = 48 × 21/5 × 21 = 1008/105
Subtract the two like fractions:
225/105 - 1008/105 = 225 - 1008/105 = -783/105
After reducing the fraction, the answer is -261/35

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