Subtract 35/42 from 4/80
4/80 - 35/42 is -47/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
4/80 = 4 × 21/80 × 21 = 84/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
35/42 = 35 × 40/42 × 40 = 1400/1680 - Subtract the two like fractions:
84/1680 - 1400/1680 = 84 - 1400/1680 = -1316/1680 - After reducing the fraction, the answer is -47/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/80-35/42 4/80-70/42 4/80-35/84 12/80-35/42 20/80-35/42 28/80-35/42