Subtract 4/70 from 9/84
9/84 - 4/70 is 1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
9/84 = 9 × 5/84 × 5 = 45/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
4/70 = 4 × 6/70 × 6 = 24/420 - Subtract the two like fractions:
45/420 - 24/420 = 45 - 24/420 = 21/420 - After reducing the fraction, the answer is 1/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84-4/70 9/84-8/70 27/84-4/70 9/84-12/70 45/84-4/70 9/84-20/70 63/84-4/70 9/84-28/70