A percent is actually a ratio! Saying "25%" is actually saying "25 per 100": 25% = 25100 We … See more

We can use proportions to solve similar triangles. The "Height" could have been at the bottom, so long as it was on the bottom for BOTH ratios, like this: See more

Ratios can have more than two numbers! For example concrete is made by mixing cement, sand, stones and water. A typical mix of cement, sand and stones is written as a ratio, s… See more