A picture is 45 cm wide and 9 m long. The ratio of its width to its length in its lowest form is A. 9: 45, B. 5: 1, C. 1: 5, D. 45: 9

To find the ratio of the width to the length, we need both measurements in the same units. The width is 45 cm, which is 0.45 m. The length is already given as 9 m. Thus, the ratio of the width to the length is 0.45:9. Simplifying this, we multiply both sides by 100 to eliminate the decimal, giving us 45:900. Dividing both the width and length by 45 yields 1:20. Therefore, none of the provided options are correct. If we were to explore further into the fascinating world of ratios, we'd find that ratios help us understand relationships between different quantities—like how to share a pizza among friends! Converting units and finding the simplest form makes calculations easier and clearer in real-life scenarios, such as scaling plans or recipes!