Subtract 30/4 from 42/50, Solve 42/50

Subtract 30/4 from 42/50

1^st number: 42/50, 2^nd number: 7 2/4

42/50 - 30/4 is -333/50.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 4 is 100

Next, find the equivalent fraction of both fractional numbers with denominator 100
For the 1st fraction, since 50 × 2 = 100,
42/50 = 42 × 2/50 × 2 = 84/100
Likewise, for the 2nd fraction, since 4 × 25 = 100,
30/4 = 30 × 25/4 × 25 = 750/100
Subtract the two like fractions:
84/100 - 750/100 = 84 - 750/100 = -666/100
After reducing the fraction, the answer is -333/50

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