Answers

Subtract 80/60 from 45/90

1^st number: 45/90, 2^nd number: 1 20/60

45/90 - 80/60 is -5/6.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 60 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   45/90 = 45 × 2/90 × 2 = 90/180
3. Likewise, for the 2nd fraction, since 60 × 3 = 180,
   80/60 = 80 × 3/60 × 3 = 240/180
4. Subtract the two like fractions:
   90/180 - 240/180 = 90 - 240/180 = -150/180
5. After reducing the fraction, the answer is -5/6

MathStep (Works offline)

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

Related:

Subtract Fractions Calculator