21/45 subtracted by 2/4 in Fraction Form

The result of 21/45 subtracted by 2/4 is: -1/30

Step-by-Step Solution

Step 1: Understand the Problem

We need to subtract the fraction $\frac{2}{4}$ from $\frac{2}{1} 45$ .

Step 2: Find the Least Common Multiple (LCM)

To subtract fractions, we need a common denominator. The LCM of 45 and 4 is 180.

Step 3: Convert Fractions to Equivalent Fractions

Convert $\frac{2}{1} 45$ to $\frac{84}{1} 80$
Convert $\frac{2}{4}$ to $\frac{90}{1} 80$

Step 4: Subtract the Numerators

Subtract the numerators: 84 - 90 = -6

Step 5: Simplify the Fraction

We can simplify $\frac{-}{6} 180$ to its lowest form.
The greatest common divisor (GCD) of -6 and 180 is 6.
Dividing both numerator and denominator by the GCD, we get $\frac{-}{1} 30$ .

Final Answer

The result of 21/45 subtracted by 2/4 is:

\frac{21}{45} - \frac{2}{4} = \frac{-}{1} 30

Understanding Fraction Subtraction

How to Subtract Fractions

To subtract fractions, you need to ensure they have a common denominator. Then subtract the numerators:

$\frac{a}{b} - \frac{c}{d} = \frac{a d - b c}{b d}$ (when denominators are different)

Or simply $\frac{a}{b} - \frac{c}{b} = \frac{a - c}{b}$ (when denominators are the same)

Why Simplify Fractions?

Simplifying fractions makes them easier to work with and understand. A fraction is in its simplest form when the numerator and denominator have no common factors other than 1.

To simplify a fraction, divide both the numerator and denominator by their greatest common divisor (GCD).

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