Subtract 81/70 from 54/40, Solve 1 14/40

Subtract 81/70 from 54/40

1^st number: 1 14/40, 2^nd number: 1 11/70

54/40 - 81/70 is 27/140.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 40 × 7 = 280,
54/40 = 54 × 7/40 × 7 = 378/280
Likewise, for the 2nd fraction, since 70 × 4 = 280,
81/70 = 81 × 4/70 × 4 = 324/280
Subtract the two like fractions:
378/280 - 324/280 = 378 - 324/280 = 54/280
After reducing the fraction, the answer is 27/140

MathStep (Works offline)

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