22,5:0,45

To calculate \( 22.5 \div 0.45 \), you can follow these steps:

1. Move the decimal points to the right to make the divisor (0.45) a whole number. Multiply both the numerator and the divisor by 100 to get: \[ 22.5 \times 100 = 2250 \quad \text{and} \quad 0.45 \times 100 = 45 \] So the problem simplifies to: \[ \frac{2250}{45} \]

2. Now, divide 2250 by 45: \[ 2250 \div 45 = 50 \]

Thus, \( 22.5 \div 0.45 = 50 \).