Subtract 80/42 from 8/5
1st number: 1 3/5, 2nd number: 1 38/42
8/5 - 80/42 is -32/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
8/5 = 8 × 42/5 × 42 = 336/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Subtract the two like fractions:
336/210 - 400/210 = 336 - 400/210 = -64/210 - After reducing the fraction, the answer is -32/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5-80/42 8/10-80/42 8/5-80/84 24/5-80/42 8/15-80/42 40/5-80/42 8/25-80/42 56/5-80/42 8/35-80/42