Subtract 1/3 from 42/10, Solve 4 2/10

Subtract 1/3 from 42/10

1^st number: 4 2/10, 2^nd number: 1/3

42/10 - 1/3 is 58/15.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 3 is 30

Next, find the equivalent fraction of both fractional numbers with denominator 30
For the 1st fraction, since 10 × 3 = 30,
42/10 = 42 × 3/10 × 3 = 126/30
Likewise, for the 2nd fraction, since 3 × 10 = 30,
1/3 = 1 × 10/3 × 10 = 10/30
Subtract the two like fractions:
126/30 - 10/30 = 126 - 10/30 = 116/30
After reducing the fraction, the answer is 58/15
In mixed form: 313/15

MathStep (Works offline)

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