Subtract 75/70 from 1/12, Solve 1/12

Subtract 75/70 from 1/12

1^st number: 1/12, 2^nd number: 1 5/70

1/12 - 75/70 is -83/84.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 12 × 35 = 420,
1/12 = 1 × 35/12 × 35 = 35/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
75/70 = 75 × 6/70 × 6 = 450/420
Subtract the two like fractions:
35/420 - 450/420 = 35 - 450/420 = -415/420
After reducing the fraction, the answer is -83/84

MathStep (Works offline)

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