How To Calculate Proportion

Ratios and proportions | Lesson (article) | Khan Academy

https://www.khanacademy.org/test-prep/praxis-math/praxis-math-lessons/praxis-math-number-and-quantity/a/gtp--praxis-math--article--ratios-and-proportions--lesson

To write a ratio: Determine whether the ratio is part to part or part to whole. Calculate the parts and the whole if needed. Plug values into the ratio. Simplify the ratio if needed. Integer-to-integer ratios are preferred.

Proportion Calculator | How to solve proportions?

https://www.omnicalculator.com/math/proportion

8 Ways to Solve Proportions - wikiHow

https://www.wikihow.com/Solve-Proportions

How do I solve a proportion step by step by cross-multiplying? 1 Draw two diagonal lines in an "X" across the proportion. For example, write down this proportion, then draw …

Worked example: Solving proportions (video) | Khan …

https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-write-and-solve-proportions/v/find-an-unknown-in-a-proportion

Try drawing an 'X' with your fingers on the proportion above. That's how we'll cross-multiply it. The equation will ultimately look like this: 2 ⋅ n = 10 ⋅ 9. Simplify the equation and you get: 2n = 90. To solve it, you just divide 2 on both sides: 2n = 90 ÷2 = ÷2 n = 45 I hope this …

Proportions - Math is Fun

https://www.mathsisfun.com/algebra/proportions.html

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, such as 1:2:6. We can multiply all values by the same amount and still have the same ratio. …