Subtract 20/45 from 27/24, Solve 1 3/24

Subtract 20/45 from 27/24

1^st number: 1 3/24, 2^nd number: 20/45

27/24 - 20/45 is 49/72.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 45 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 24 × 15 = 360,
27/24 = 27 × 15/24 × 15 = 405/360
Likewise, for the 2nd fraction, since 45 × 8 = 360,
20/45 = 20 × 8/45 × 8 = 160/360
Subtract the two like fractions:
405/360 - 160/360 = 405 - 160/360 = 245/360
After reducing the fraction, the answer is 49/72

MathStep (Works offline)

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