Subtract 5/84 from 4/40
4/40 - 5/84 is 17/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
4/40 = 4 × 21/40 × 21 = 84/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
5/84 = 5 × 10/84 × 10 = 50/840 - Subtract the two like fractions:
84/840 - 50/840 = 84 - 50/840 = 34/840 - After reducing the fraction, the answer is 17/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/40-5/84 4/40-10/84 4/80-5/84 12/40-5/84 4/40-15/84 20/40-5/84 4/40-25/84 28/40-5/84 4/40-35/84