Subtract 21/12 from 54/10, Solve 5 4/10

Subtract 21/12 from 54/10

1^st number: 5 4/10, 2^nd number: 1 9/12

54/10 - 21/12 is 73/20.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 10 × 6 = 60,
54/10 = 54 × 6/10 × 6 = 324/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60
Subtract the two like fractions:
324/60 - 105/60 = 324 - 105/60 = 219/60
After reducing the fraction, the answer is 73/20
In mixed form: 313/20

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