Answers

Subtract 20/80 from 75/30

1^st number: 2 15/30, 2^nd number: 20/80

75/30 - 20/80 is 9/4.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 30 × 8 = 240,
   75/30 = 75 × 8/30 × 8 = 600/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   20/80 = 20 × 3/80 × 3 = 60/240
4. Subtract the two like fractions:
   600/240 - 60/240 = 600 - 60/240 = 540/240
5. After reducing the fraction, the answer is 9/4
6. In mixed form: 21/4

MathStep (Works offline)

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

Related: ⁷⁵/₃₀-⁴⁰/₈₀ ⁷⁵/₆₀-²⁰/₈₀ ⁷⁵/₃₀-⁶⁰/₈₀ ⁷⁵/₉₀-²⁰/₈₀

Subtract Fractions Calculator