Subtract 75/40 from 12/84
1st number: 12/84, 2nd number: 1 35/40
12/84 - 75/40 is -97/56.
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,
12/84 = 12 × 10/84 × 10 = 120/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
75/40 = 75 × 21/40 × 21 = 1575/840 - Subtract the two like fractions:
120/840 - 1575/840 = 120 - 1575/840 = -1455/840 - After reducing the fraction, the answer is -97/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84-75/40 12/84-75/80 36/84-75/40 60/84-75/40