Subtract 3/70 from 21/24
21/24 - 3/70 is 233/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 70 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 24 × 35 = 840,
21/24 = 21 × 35/24 × 35 = 735/840 - Likewise, for the 2nd fraction, since 70 × 12 = 840,
3/70 = 3 × 12/70 × 12 = 36/840 - Subtract the two like fractions:
735/840 - 36/840 = 735 - 36/840 = 699/840 - After reducing the fraction, the answer is 233/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-3/70 21/24-6/70 21/48-3/70 63/24-3/70 21/24-9/70 21/72-3/70 21/24-15/70 21/24-21/70