Subtract 4/5 from 90/64, Solve 1 26/64

Subtract 4/5 from 90/64

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

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

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

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