Subtract 63/70 from 28/30
28/30 - 63/70 is 1/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
63/70 = 63 × 3/70 × 3 = 189/210 - Subtract the two like fractions:
196/210 - 189/210 = 196 - 189/210 = 7/210 - After reducing the fraction, the answer is 1/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-63/70 28/60-63/70 84/30-63/70 28/90-63/70