Answers

Subtract 81/80 from 50/60

1^st number: 50/60, 2^nd number: 1 1/80

50/60 - 81/80 is -43/240.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 60 × 4 = 240,
   50/60 = 50 × 4/60 × 4 = 200/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   81/80 = 81 × 3/80 × 3 = 243/240
4. Subtract the two like fractions:
   200/240 - 243/240 = 200 - 243/240 = -43/240

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