Express each of the following as a per cent :
`0.45`

Answer

To express 0.45 as a percentage, follow these steps:

### Step 1: Write 0.45 as a fraction
0.45 can be expressed as a fraction. It can be written as:
\[ 0.45 = \frac{45}{100} \]

### Step 2: Convert the fraction to a percentage
To convert a fraction to a percentage, you multiply it by 100. Thus, we have:
\[ \frac{45}{100} \times 100 \]

### Step 3: Simplify the expression
When you multiply \(\frac{45}{100}\) by 100, the 100 in the numerator and the 100 in the denominator cancel out:
\[ \frac{45 \times 100}{100} = 45 \]

### Step 4: Write the final answer
Therefore, the percentage is:
\[ 45\% \]

### Final Answer:
0.45 is equal to 45%.

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