Answers

Subtract 36/80 from 90/70

1^st number: 1 20/70, 2^nd number: 36/80

90/70 - 36/80 is 117/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 70 × 8 = 560,
   90/70 = 90 × 8/70 × 8 = 720/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   36/80 = 36 × 7/80 × 7 = 252/560
4. Subtract the two like fractions:
   720/560 - 252/560 = 720 - 252/560 = 468/560
5. After reducing the fraction, the answer is 117/140

MathStep (Works offline)

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

Related: ⁹⁰/₇₀-⁷²/₈₀

Subtract Fractions Calculator