Subtract 7/80 from 70/54, Solve 1 16/54

Subtract 7/80 from 70/54

1^st number: 1 16/54, 2^nd number: 7/80

70/54 - 7/80 is 2611/2160.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 80 is 2160

Next, find the equivalent fraction of both fractional numbers with denominator 2160
For the 1st fraction, since 54 × 40 = 2160,
70/54 = 70 × 40/54 × 40 = 2800/2160
Likewise, for the 2nd fraction, since 80 × 27 = 2160,
7/80 = 7 × 27/80 × 27 = 189/2160
Subtract the two like fractions:
2800/2160 - 189/2160 = 2800 - 189/2160 = 2611/2160
In mixed form: 1451/2160

MathStep (Works offline)

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