1 1/2:1,5

The ratio of \(1 \frac{1}{2}\) to \(1.5\) can be expressed as follows:

1. Convert \(1 \frac{1}{2}\) to an improper fraction: \[ 1 \frac{1}{2} = \frac{3}{2} \]

2. Write the ratio: \[ \text{Ratio} = \frac{3/2}{1.5} \]

3. Convert \(1.5\) to a fraction: \[ 1.5 = \frac{3}{2} \]

4. Now express the ratio: \[ \text{Ratio} = \frac{3/2}{3/2} = 1 \]

So, the ratio of \(1 \frac{1}{2}\) to \(1.5\) simplifies to \(1:1\).