Answers

Subtract 7/72 from 90/70

1^st number: 1 20/70, 2^nd number: 7/72

90/70 - 7/72 is 599/504.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 72 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 70 × 36 = 2520,
   90/70 = 90 × 36/70 × 36 = 3240/2520
3. Likewise, for the 2nd fraction, since 72 × 35 = 2520,
   7/72 = 7 × 35/72 × 35 = 245/2520
4. Subtract the two like fractions:
   3240/2520 - 245/2520 = 3240 - 245/2520 = 2995/2520
5. After reducing the fraction, the answer is 599/504
6. In mixed form: 195/504

MathStep (Works offline)

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

Related: ⁹⁰/₇₀-¹⁴/₇₂ ⁹⁰/₇₀-²¹/₇₂ ⁹⁰/₇₀-³⁵/₇₂ ⁹⁰/₇₀-⁴⁹/₇₂

Subtract Fractions Calculator