What is 21/2-6/8?

How much is 212 minus 68. Step by step solution expressed as a proper or improper fraction, mixed number and decimal form.

  • 394
  • 9 34
  • 9.75

Step by step solution

Subtract

212 - 68 = 788

  1. Find common denominator by finding the Least Common Multiple(LCM)

    Multiples of 2 are   2, 4, 6, 8 ....etc

    Multiples of 8 are   8 ...etc

    The LCM of 2 and 8 is 8. So, the common denominator of 212 and 68 is 8. Now change the fractions into equivalent fractions with common denominator

    • 212 - 68
    • 21 * 42 * 4 - 6 * 18 * 1
    • 848 - 68
  2. Subtract

    • 848 - 68
    • 84 - 68
    • 788

    Subtract the numerators and place the difference over the common denominator.

Simplify

  • 788
  • 394
  • 9 34
  1. Reduce fraction to its lowest terms

    • 788
    • 78 ÷ 28 ÷ 2
    • 394

    The greatest common divisor of 78 and 8 is 2, the fraction 788 can be simplified or reduced to lowest terms by dividing the numerator and denominator by 2.

  2. Convert improper fraction 394 to mixed number

    • 394
    • 9 34

    39 divided by 4 is 9 with a remainder of 3