# What is 12/21-16/6?

How much is 1221 minus 166. Step by step solution expressed as a proper or improper fraction, mixed number and decimal form.

• - 4421
• - 2 221
• 2.0952 (rounded to 4 decimals)

## Step by step solution

Subtract

1221 - 166 = - 8842

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

Multiples of 21 are   21, 42 ....etc

Multiples of 6 are   6, 12, 18, 24, 30, 36, 42 ...etc

The LCM of 21 and 6 is 42. So, the common denominator of 1221 and 166 is 42. Now change the fractions into equivalent fractions with common denominator

• 1221 - 166
• 12 * 221 * 2 - 16 * 76 * 7
• 2442 - 11242
2. ### Subtract

• 2442 - 11242
• 24 - 11242
• - 8842

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

Simplify

• - 8842
• - 4421
• - 2 221
1. ### Reduce fraction to its lowest terms

• - 8842
• - 88 ÷ 242 ÷ 2
• - 4421

The greatest common divisor of 88 and 42 is 2, the fraction - 8842 can be simplified or reduced to lowest terms by dividing the numerator and denominator by 2.

2. ### Convert improper fraction 4421 to mixed number

• - 4421
• - 2 221

44 divided by 21 is 2 with a remainder of 2