Subtract 35/7 from 3/80, Solve 3/80

Subtract 35/7 from 3/80

1^st number: 3/80, 2^nd number: 5 0/7

3/80 - 35/7 is -397/80.

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,
35/7 = 35 × 80/7 × 80 = 2800/560
Subtract the two like fractions:
21/560 - 2800/560 = 21 - 2800/560 = -2779/560
After reducing the fraction, the answer is -397/80

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad