Subtract 18/10 from 30/32, Solve 30/32

Subtract 18/10 from 30/32

1^st number: 30/32, 2^nd number: 1 8/10

30/32 - 18/10 is -69/80.

Find the least common denominator or LCM of the two denominators:
LCM of 32 and 10 is 160

Next, find the equivalent fraction of both fractional numbers with denominator 160
For the 1st fraction, since 32 × 5 = 160,
30/32 = 30 × 5/32 × 5 = 150/160
Likewise, for the 2nd fraction, since 10 × 16 = 160,
18/10 = 18 × 16/10 × 16 = 288/160
Subtract the two like fractions:
150/160 - 288/160 = 150 - 288/160 = -138/160
After reducing the fraction, the answer is -69/80

MathStep (Works offline)

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