Subtract 90/8 from 4/10
1st number: 4/10, 2nd number: 11 2/8
4/10 - 90/8 is -217/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
4/10 = 4 × 4/10 × 4 = 16/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
90/8 = 90 × 5/8 × 5 = 450/40 - Subtract the two like fractions:
16/40 - 450/40 = 16 - 450/40 = -434/40 - After reducing the fraction, the answer is -217/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10-90/8 4/20-90/8 4/10-90/16 12/10-90/8 4/30-90/8 4/10-90/24 20/10-90/8 4/50-90/8 4/10-90/40 28/10-90/8 4/70-90/8 4/10-90/56