Subtract 9/25 from 63/42, Solve 1 21/42

Subtract 9/25 from 63/42

1^st number: 1 21/42, 2^nd number: 9/25

63/42 - 9/25 is 57/50.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 25 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 42 × 25 = 1050,
63/42 = 63 × 25/42 × 25 = 1575/1050
Likewise, for the 2nd fraction, since 25 × 42 = 1050,
9/25 = 9 × 42/25 × 42 = 378/1050
Subtract the two like fractions:
1575/1050 - 378/1050 = 1575 - 378/1050 = 1197/1050
After reducing the fraction, the answer is 57/50
In mixed form: 17/50

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