Subtract 9/42 from 63/20, Solve 3 3/20

Subtract 9/42 from 63/20

1^st number: 3 3/20, 2^nd number: 9/42

63/20 - 9/42 is 411/140.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
63/20 = 63 × 21/20 × 21 = 1323/420
Likewise, for the 2nd fraction, since 42 × 10 = 420,
9/42 = 9 × 10/42 × 10 = 90/420
Subtract the two like fractions:
1323/420 - 90/420 = 1323 - 90/420 = 1233/420
After reducing the fraction, the answer is 411/140
In mixed form: 2131/140

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