Subtract 42/50 from 75/21, Solve 3 12/21

Subtract 42/50 from 75/21

1^st number: 3 12/21, 2^nd number: 42/50

75/21 - 42/50 is 478/175.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 21 × 50 = 1050,
75/21 = 75 × 50/21 × 50 = 3750/1050
Likewise, for the 2nd fraction, since 50 × 21 = 1050,
42/50 = 42 × 21/50 × 21 = 882/1050
Subtract the two like fractions:
3750/1050 - 882/1050 = 3750 - 882/1050 = 2868/1050
After reducing the fraction, the answer is 478/175
In mixed form: 2128/175

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