Subtract 27/24 from 42/10, Solve 4 2/10

Subtract 27/24 from 42/10

1^st number: 4 2/10, 2^nd number: 1 3/24

42/10 - 27/24 is 123/40.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 24 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 10 × 12 = 120,
42/10 = 42 × 12/10 × 12 = 504/120
Likewise, for the 2nd fraction, since 24 × 5 = 120,
27/24 = 27 × 5/24 × 5 = 135/120
Subtract the two like fractions:
504/120 - 135/120 = 504 - 135/120 = 369/120
After reducing the fraction, the answer is 123/40
In mixed form: 33/40

MathStep (Works offline)

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