Answers

Subtract 27/70 from 42/30

1^st number: 1 12/30, 2^nd number: 27/70

42/30 - 27/70 is 71/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 70 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   42/30 = 42 × 7/30 × 7 = 294/210
3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
   27/70 = 27 × 3/70 × 3 = 81/210
4. Subtract the two like fractions:
   294/210 - 81/210 = 294 - 81/210 = 213/210
5. After reducing the fraction, the answer is 71/70
6. In mixed form: 11/70

MathStep (Works offline)

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

Related: ⁸⁴/₃₀-²⁷/₇₀ ⁴²/₃₀-⁵⁴/₇₀ ⁴²/₆₀-²⁷/₇₀ ⁴²/₃₀-⁸¹/₇₀ ⁴²/₉₀-²⁷/₇₀

Subtract Fractions Calculator