Subtract 70/30 from 42/28
1st number: 1 14/28, 2nd number: 2 10/30
42/28 - 70/30 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
42/28 = 42 × 15/28 × 15 = 630/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
70/30 = 70 × 14/30 × 14 = 980/420 - Subtract the two like fractions:
630/420 - 980/420 = 630 - 980/420 = -350/420 - After reducing the fraction, the answer is -5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28-70/30 42/56-70/30 42/28-70/60 42/84-70/30 42/28-70/90