Subtract 63/8 from 4/90
1st number: 4/90, 2nd number: 7 7/8
4/90 - 63/8 is -2819/360.
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,
4/90 = 4 × 4/90 × 4 = 16/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
63/8 = 63 × 45/8 × 45 = 2835/360 - Subtract the two like fractions:
16/360 - 2835/360 = 16 - 2835/360 = -2819/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-63/8 4/90-63/16 12/90-63/8 4/90-63/24 20/90-63/8 4/90-63/40 28/90-63/8 4/90-63/56