Subtract 2/21 from 75/45
1st number: 1 30/45, 2nd number: 2/21
75/45 - 2/21 is 11/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
75/45 = 75 × 7/45 × 7 = 525/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
2/21 = 2 × 15/21 × 15 = 30/315 - Subtract the two like fractions:
525/315 - 30/315 = 525 - 30/315 = 495/315 - After reducing the fraction, the answer is 11/7
- In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/45-4/21 75/90-2/21 75/45-2/42 75/45-6/21 75/45-2/63 75/45-10/21 75/45-14/21