# What is 25/21+13/28?

How much is 2521 plus 1328. Step by step solution expressed as a proper or improper fraction, mixed number and decimal form.

• 13984
• 1 5584
• 1.6548 (rounded to 4 decimals)

## Step by step solution

2521 + 1328 = 13984

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

Multiples of 21 are   21, 42, 63, 84 ....etc

Multiples of 28 are   28, 56, 84 ...etc

The LCM of 21 and 28 is 84. So, the common denominator of 2521 and 1328 is 84. Now change the fractions into equivalent fractions with common denominator

• 2521 + 1328
• 25 * 421 * 4 + 13 * 328 * 3
• 10084 + 3984

• 10084 + 3984
• 100 + 3984
• 13984

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

Simplify

• 13984
• 1 5584
1. ### Reduce fraction to its lowest terms

The greatest common divisor of 139 and 84 is 1, the fraction 13984 cannot be further simplified or reduced to lowest terms

2. ### Convert improper fraction 13984 to mixed number

• 13984
• 1 5584

139 divided by 84 is 1 with a remainder of 55