Science, Maths & Technology
Ratio, proportion and percentages
...Introduction - The topics in this free course, Ratio, proportion and percentages, are concerned with dividing something into parts. For example, if there are 200 people living in a small village, and 50 of these are children, this could be expressed as a percentage: 25% of the village population are children; or as a ratio: one in every four people is a child or there is...