Subtract 35/70 from 12/80
12/80 - 35/70 is -7/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
12/80 = 12 × 7/80 × 7 = 84/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
35/70 = 35 × 8/70 × 8 = 280/560 - Subtract the two like fractions:
84/560 - 280/560 = 84 - 280/560 = -196/560 - After reducing the fraction, the answer is -7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80-35/70 36/80-35/70 60/80-35/70 84/80-35/70