Answers

Subtract 21/64 from 84/30

1^st number: 2 24/30, 2^nd number: 21/64

84/30 - 21/64 is 791/320.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 64 is 960
   
   Next, find the equivalent fraction of both fractional numbers with denominator 960
2. For the 1st fraction, since 30 × 32 = 960,
   84/30 = 84 × 32/30 × 32 = 2688/960
3. Likewise, for the 2nd fraction, since 64 × 15 = 960,
   21/64 = 21 × 15/64 × 15 = 315/960
4. Subtract the two like fractions:
   2688/960 - 315/960 = 2688 - 315/960 = 2373/960
5. After reducing the fraction, the answer is 791/320
6. In mixed form: 2151/320

MathStep (Works offline)

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

Related: ⁸⁴/₃₀-⁴²/₆₄ ⁸⁴/₆₀-²¹/₆₄ ⁸⁴/₃₀-⁶³/₆₄ ⁸⁴/₉₀-²¹/₆₄

Subtract Fractions Calculator