Subtract 45/50 from 42/12, Solve 3 6/12

Subtract 45/50 from 42/12

1^st number: 3 6/12, 2^nd number: 45/50

42/12 - 45/50 is 13/5.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 50 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 12 × 25 = 300,
42/12 = 42 × 25/12 × 25 = 1050/300
Likewise, for the 2nd fraction, since 50 × 6 = 300,
45/50 = 45 × 6/50 × 6 = 270/300
Subtract the two like fractions:
1050/300 - 270/300 = 1050 - 270/300 = 780/300
After reducing the fraction, the answer is 13/5
In mixed form: 23/5

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad