Subtract 18/45 from 40/14, Solve 2 12/14

Subtract 18/45 from 40/14

1^st number: 2 12/14, 2^nd number: 18/45

40/14 - 18/45 is 86/35.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 45 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 45 × 14 = 630,
18/45 = 18 × 14/45 × 14 = 252/630
Subtract the two like fractions:
1800/630 - 252/630 = 1800 - 252/630 = 1548/630
After reducing the fraction, the answer is 86/35
In mixed form: 216/35

MathStep (Works offline)

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