Subtract 30/9 from 45/30
1st number: 1 15/30, 2nd number: 3 3/9
45/30 - 30/9 is -11/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
45/30 = 45 × 3/30 × 3 = 135/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
30/9 = 30 × 10/9 × 10 = 300/90 - Subtract the two like fractions:
135/90 - 300/90 = 135 - 300/90 = -165/90 - After reducing the fraction, the answer is -11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-30/9 45/30-60/9 45/60-30/9 45/30-30/18 45/30-90/9 45/90-30/9 45/30-30/27 45/30-30/45 45/30-30/63