# What is 12/21+16/6?

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

• 6821
• 3 521
• 3.2381 (rounded to 4 decimals)

## Step by step solution

1221 + 166 = 13642

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

• 2442 + 11242
• 24 + 11242
• 13642

Add the numerators and place the sum over the common denominator.

Simplify

• 13642
• 6821
• 3 521
1. ### Reduce fraction to its lowest terms

• 13642
• 136 ÷ 242 ÷ 2
• 6821

The greatest common divisor of 136 and 42 is 2, the fraction 13642 can be simplified or reduced to lowest terms by dividing the numerator and denominator by 2.

2. ### Convert improper fraction 6821 to mixed number

• 6821
• 3 521

68 divided by 21 is 3 with a remainder of 5