How to Write 0.45 as a Fraction

To write 0.45 as a fraction, follow these steps:

1. Write down the number as a fraction of one: 0.45 = 0.45/1
2. Multiply both the numerator and the denominator by 100 (since there are 2 digits after the decimal point): 0.45/1 × 100/100 = 45/100
3. Simplify the fraction by dividing both the numerator and the denominator by their greatest common divisor (GCD). The GCD of 45 and 100 is 5: 45 ÷ 5 = 9 and 100 ÷ 5 = 20

So, 0.45 as a fraction is 9/20.