Subtract 9/30 from 81/8
1st number: 10 1/8, 2nd number: 9/30
81/8 - 9/30 is 393/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
81/8 = 81 × 15/8 × 15 = 1215/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
9/30 = 9 × 4/30 × 4 = 36/120 - Subtract the two like fractions:
1215/120 - 36/120 = 1215 - 36/120 = 1179/120 - After reducing the fraction, the answer is 393/40
- In mixed form: 933/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/8-18/30 81/16-9/30 81/8-9/60 81/8-27/30 81/24-9/30 81/8-9/90 81/8-45/30 81/40-9/30 81/8-63/30 81/56-9/30