Subtract 30/21 from 9/5
1st number: 1 4/5, 2nd number: 1 9/21
9/5 - 30/21 is 13/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
9/5 = 9 × 21/5 × 21 = 189/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
30/21 = 30 × 5/21 × 5 = 150/105 - Subtract the two like fractions:
189/105 - 150/105 = 189 - 150/105 = 39/105 - After reducing the fraction, the answer is 13/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/5-30/21 9/5-60/21 9/10-30/21 9/5-30/42 27/5-30/21 9/5-90/21 9/15-30/21 9/5-30/63 45/5-30/21 9/25-30/21 63/5-30/21 9/35-30/21