Lesson 7 1 How do you write ratios

Lesson 7. 1 • How do you write ratios and find unit rates? – To write a ratio, you make a fraction comparing the two numbers and reduce the fraction.

Lesson 7. 2 • How do you write and solve proportions? – To write a proportion, you set two ratios equal to each other. • When you write the proportion the ratios must compare corresponding quantities. – You can solve a proportion as though it’s an equation and isolate the variable. – You can use cross products to solve.

Lesson 7. 3 •

Lesson 7. 4 • How do you convert between fractions, decimals and percents? – To write a percent as a decimal, you can divide by 100. – To write a decimal as a percent, you can multiply by 100. – To write p% as a fraction, use p as the numerator and 100 as the denominator. Reduce. – To write a fraction as a percent, create an equivalent fraction with a denominator of 100.

Lesson 7. 5 • How do you solve problems with percent of increase or decrease? – You will use the percent of change formula to solve problems with a percent of increase or decrease.

Lessons 7. 6 • How do you solve percent application problems? – To solve percent application problems, you will multiply the percent by the price to find sales tax, tip, markup and discount. – You will then either add or subtract to find a sale price, retail price or total cost.

Lessons 7. 7 • How do you solve percent problems using the percent equation? – Write the percent equation. – Substitute the values you know. – Solve for the unknown variable. – Remember, of means multiplication and is means equals.

Lessons 7. 8 •