Subtract 70/18 from 54/14, Solve 3 12/14

Subtract 70/18 from 54/14

1^st number: 3 12/14, 2^nd number: 3 16/18

54/14 - 70/18 is -2/63.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 14 × 9 = 126,
54/14 = 54 × 9/14 × 9 = 486/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126
Subtract the two like fractions:
486/126 - 490/126 = 486 - 490/126 = -4/126
After reducing the fraction, the answer is -2/63

MathStep (Works offline)

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