Subtract 54/21 from 75/30
1st number: 2 15/30, 2nd number: 2 12/21
75/30 - 54/21 is -1/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
75/30 = 75 × 7/30 × 7 = 525/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
54/21 = 54 × 10/21 × 10 = 540/210 - Subtract the two like fractions:
525/210 - 540/210 = 525 - 540/210 = -15/210 - After reducing the fraction, the answer is -1/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/60-54/21 75/30-54/42 75/90-54/21 75/30-54/63