Subtract 28/30 from 45/42
1st number: 1 3/42, 2nd number: 28/30
45/42 - 28/30 is 29/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
45/42 = 45 × 5/42 × 5 = 225/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210 - Subtract the two like fractions:
225/210 - 196/210 = 225 - 196/210 = 29/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-28/30 45/42-56/30 45/84-28/30 45/42-28/60 45/42-84/30 45/42-28/90