Subtract 12/90 from 3/8
3/8 - 12/90 is 29/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
3/8 = 3 × 45/8 × 45 = 135/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
12/90 = 12 × 4/90 × 4 = 48/360 - Subtract the two like fractions:
135/360 - 48/360 = 135 - 48/360 = 87/360 - After reducing the fraction, the answer is 29/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/8-12/90 3/8-24/90 3/16-12/90 9/8-12/90 3/8-36/90 3/24-12/90 15/8-12/90 3/8-60/90 3/40-12/90 21/8-12/90 3/8-84/90 3/56-12/90