25/7,505 - 19/7,509 = ? Subtracting ordinary (common) fractions, online calculator, subtraction operation explained in detail. The answer, written in three ways. As a positive proper fraction (the numerator < the denominator). As a decimal number. As a percentage.

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Add common ordinary fractions, online calculator:

 Add the fractions: 25/7,505 - 19/7,509 = ? Aug 11 06:44 UTC (GMT) Add the fractions: - 63/20 - 143/46 = ? Aug 11 06:44 UTC (GMT) Add the fractions: 99/172 - 52/100 = ? Aug 11 06:44 UTC (GMT) Add the fractions: - 26/117 - 435/10 = ? Aug 11 06:44 UTC (GMT) Add the fractions: 315/6,013 + 21/9 = ? Aug 11 06:44 UTC (GMT) Add the fractions: - 108/38 - 33/67 = ? Aug 11 06:44 UTC (GMT) Add the fractions: 84/34 - 38/75 = ? Aug 11 06:44 UTC (GMT) Add the fractions: 52/74 - 61/152 = ? Aug 11 06:44 UTC (GMT) Add the fractions: 51/287 + 87/47 = ? Aug 11 06:44 UTC (GMT) Add the fractions: 48/5,503 - 3,298/64 = ? Aug 11 06:44 UTC (GMT) All the operations with added fractions

How to: Adding ordinary (simple, common) fractions. Steps.

There are two cases regarding the denominators when we add ordinary fractions:

• A. the fractions have like denominators;
• B. the fractions have unlike denominators.

A. How to add ordinary fractions that have like denominators?

• Simply add the numerators of the fractions.
• The denominator of the resulting fraction will be the common denominator of the fractions.
• Reduce the resulting fraction.

An example of adding ordinary fractions that have like denominators, with explanations

• 3/18 + 4/18 + 5/18 = (3 + 4 + 5)/18 = 12/18;

• We simply added the numerators of the fractions: 3 + 4 + 5 = 12;
• The denominator of the resulting fraction is: 18;

B. To add fractions with different denominators (unlike denominators), build up the fractions to the same denominator. How is it done?

• 1. Reduce the fractions to the lowest terms (simplifying).

• Factor the numerator and the denominator of each fraction down to prime factors (prime factorization).
• Factor numbers online down to their prime factors.

• Calculate GCF, the greatest common factor (also called GCD, greatest common divisor, HCF, greatest common factor) of each fraction's numerator and denominator.
• GCF is the product of all the unique common prime factors of the numerator and the denominator, taken by the lowest exponents.
• Calculate online the greatest common factor, GCF.

• Divide the numerator and the denominator of each fraction by their greatest common factor, GCF - after this operation the fraction is reduced to its lowest terms equivalent.

• 2. Calculate the least common multiple, LCM, of all the fractions' new denominators:

• LCM is going to be the common denominator of the added fractions.
• Factor all the new denominators of the reduced fractions (run the prime factorization).
• The least common multiple, LCM, is the product of all the unique prime factors of the denominators, taken by the largest exponents.

• 3. Calculate each fraction's expanding number:

• The expanding number is the non-zero number that will be used to multiply both the numerator and the denominator of each fraction, in order to build all the fractions up to the same common denominator.
• Divide the least common multiple, LCM, calculated above, by each fraction's denominator, in order to calculate each fraction's expanding number.
• 4. Expand each fraction:

• Multiply each fraction's both numerator and denominator by expanding number.
• At this point, fractions are built up to the same denominator.