Subtract 12/90 from 40/14, Solve 2 12/14

Subtract 12/90 from 40/14

1^st number: 2 12/14, 2^nd number: 12/90

40/14 - 12/90 is 286/105.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 90 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 14 × 45 = 630,
40/14 = 40 × 45/14 × 45 = 1800/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
12/90 = 12 × 7/90 × 7 = 84/630
Subtract the two like fractions:
1800/630 - 84/630 = 1800 - 84/630 = 1716/630
After reducing the fraction, the answer is 286/105
In mixed form: 276/105

MathStep (Works offline)

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