Subtract 63/90 from 4/30
4/30 - 63/90 is -17/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
4/30 = 4 × 3/30 × 3 = 12/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
63/90 = 63 × 1/90 × 1 = 63/90 - Subtract the two like fractions:
12/90 - 63/90 = 12 - 63/90 = -51/90 - After reducing the fraction, the answer is -17/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/30-63/90 4/60-63/90 12/30-63/90 4/90-63/90 20/30-63/90 28/30-63/90