Subtract 12/40 from 6/84
6/84 - 12/40 is -8/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
6/84 = 6 × 10/84 × 10 = 60/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
12/40 = 12 × 21/40 × 21 = 252/840 - Subtract the two like fractions:
60/840 - 252/840 = 60 - 252/840 = -192/840 - After reducing the fraction, the answer is -8/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/84-12/40 6/84-24/40 6/84-12/80 18/84-12/40 6/84-36/40 30/84-12/40 6/84-60/40 42/84-12/40 6/84-84/40