Subtract 12/70 from 21/4
1st number: 5 1/4, 2nd number: 12/70
21/4 - 12/70 is 711/140.
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,
21/4 = 21 × 35/4 × 35 = 735/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
12/70 = 12 × 2/70 × 2 = 24/140 - Subtract the two like fractions:
735/140 - 24/140 = 735 - 24/140 = 711/140 - In mixed form: 511/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-12/70 21/4-24/70 21/8-12/70 63/4-12/70 21/4-36/70 21/12-12/70 21/4-60/70 21/20-12/70 21/4-84/70 21/28-12/70