Subtract 27/8 from 15/90
1st number: 15/90, 2nd number: 3 3/8
15/90 - 27/8 is -77/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
15/90 = 15 × 4/90 × 4 = 60/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
27/8 = 27 × 45/8 × 45 = 1215/360 - Subtract the two like fractions:
60/360 - 1215/360 = 60 - 1215/360 = -1155/360 - After reducing the fraction, the answer is -77/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90-27/8 15/90-54/8 15/90-27/16 45/90-27/8 15/90-81/8 15/90-27/24 75/90-27/8 15/90-27/40 15/90-27/56