Answers

Subtract 98/80 from 42/15

1^st number: 2 12/15, 2^nd number: 1 18/80

42/15 - 98/80 is 63/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 15 × 16 = 240,
   42/15 = 42 × 16/15 × 16 = 672/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   98/80 = 98 × 3/80 × 3 = 294/240
4. Subtract the two like fractions:
   672/240 - 294/240 = 672 - 294/240 = 378/240
5. After reducing the fraction, the answer is 63/40
6. In mixed form: 123/40

MathStep (Works offline)

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

Related: ⁸⁴/₁₅-⁹⁸/₈₀ ⁴²/₃₀-⁹⁸/₈₀ ⁴²/₄₅-⁹⁸/₈₀ ⁴²/₇₅-⁹⁸/₈₀

Subtract Fractions Calculator