Subtract 90/64 from 4/5, Solve 4/5 - 1 26/64 as a fraction

Subtract 90/64 from 4/5

1^st number: 4/5, 2^nd number: 1 26/64

4/5 - 90/64 is -97/160.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 64 is 320

Next, find the equivalent fraction of both fractional numbers with denominator 320
For the 1st fraction, since 5 × 64 = 320,
4/5 = 4 × 64/5 × 64 = 256/320
Likewise, for the 2nd fraction, since 64 × 5 = 320,
90/64 = 90 × 5/64 × 5 = 450/320
Subtract the two like fractions:
256/320 - 450/320 = 256 - 450/320 = -194/320
After reducing the fraction, the answer is -97/160

MathStep (Works offline)

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