Subtract 3/42 from 50/20, Solve 2 10/20

Subtract 3/42 from 50/20

1^st number: 2 10/20, 2^nd number: 3/42

50/20 - 3/42 is 17/7.

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,
50/20 = 50 × 21/20 × 21 = 1050/420
Likewise, for the 2nd fraction, since 42 × 10 = 420,
3/42 = 3 × 10/42 × 10 = 30/420
Subtract the two like fractions:
1050/420 - 30/420 = 1050 - 30/420 = 1020/420
After reducing the fraction, the answer is 17/7
In mixed form: 23/7

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