# 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