Question

How does the metric system help with quantitative measurements?

Answer 1

Quantitative measurements are those that are expressed in values. For example, weight, length, distance, force, velocity and many other measurements are quantitative. 

By using the metric system, an easy to understand standard becomes available for scientists and engineers all around the world. The majority of the world uses the metric system. Therefore, if an engineer in Germany designs an object and writes its measurements down in the metric system, any other engineer from a country using the metric system can understand those measurements easily.

Answer 2

Metric system is using a decimal scale that easy to understand and converted. When you try to convert a unit in the metric system you only need to divide or multiply it with $10^{x}$. That will help you much in the quantitative measurement since it was expressed in number, not like qualitative measurement.