Subtract 42/7 from 3/80
1st number: 3/80, 2nd number: 6 0/7
3/80 - 42/7 is -477/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 7 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
3/80 = 3 × 7/80 × 7 = 21/560 - Likewise, for the 2nd fraction, since 7 × 80 = 560,
42/7 = 42 × 80/7 × 80 = 3360/560 - Subtract the two like fractions:
21/560 - 3360/560 = 21 - 3360/560 = -3339/560 - After reducing the fraction, the answer is -477/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/80-42/7 3/80-84/7 3/80-42/14 9/80-42/7 3/80-42/21 15/80-42/7 3/80-42/35 21/80-42/7 3/80-42/49