Subtract 21/70 from 2/4
2/4 - 21/70 is 1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
2/4 = 2 × 35/4 × 35 = 70/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
21/70 = 21 × 2/70 × 2 = 42/140 - Subtract the two like fractions:
70/140 - 42/140 = 70 - 42/140 = 28/140 - After reducing the fraction, the answer is 1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/4-42/70 2/8-21/70 6/4-21/70 2/4-63/70 2/12-21/70 10/4-21/70 2/20-21/70 14/4-21/70 2/28-21/70