# What is 12/21-24/22?

How much is 1221 minus 2422. Step by step solution expressed as a proper or improper fraction, mixed number and decimal form.

• - 4077
• 0.5195 (rounded to 4 decimals)

## Step by step solution

Subtract

1221 - 2422 = - 240462

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

Multiples of 21 are   21, 42, 63, 84, 105, 126, 147, ..., 462 ....etc

Multiples of 22 are   22, 44, 66, 88, 110, 132, 154, ..., 462 ...etc

The LCM of 21 and 22 is 462. So, the common denominator of 1221 and 2422 is 462. Now change the fractions into equivalent fractions with common denominator

• 1221 - 2422
• 12 * 2221 * 22 - 24 * 2122 * 21
• 264462 - 504462
2. ### Subtract

• 264462 - 504462
• 264 - 504462
• - 240462

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

Simplify

• - 240462
• - 4077
1. ### Reduce fraction to its lowest terms

• - 240462
• - 240 ÷ 6462 ÷ 6
• - 4077

The greatest common divisor of 240 and 462 is 6, the fraction - 240462 can be simplified or reduced to lowest terms by dividing the numerator and denominator by 6.