Subtract 54/28 from 42/30
1st number: 1 12/30, 2nd number: 1 26/28
42/30 - 54/28 is -37/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
42/30 = 42 × 14/30 × 14 = 588/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
54/28 = 54 × 15/28 × 15 = 810/420 - Subtract the two like fractions:
588/420 - 810/420 = 588 - 810/420 = -222/420 - After reducing the fraction, the answer is -37/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-54/28 42/60-54/28 42/30-54/56 42/90-54/28 42/30-54/84