Calculate 45% of 100: Step-by-Step Percentage Solution

To find 45% of 100, you can multiply the percentage as a decimal by the whole number. First, convert 45% into a decimal. This is done by dividing by 100: $45\% = \frac{45}{100} = 0.45$.

Then, multiply this decimal by 100: $0.45 \times 100 = 45$.

Therefore, 45% of 100 is $45$.