Step 2 Rewrite the fraction yy as 0.65.
Step 3 Multiply 0.65 by 100 and add the % sign. 0.65 X 100 = 65 = 65%
This also can be solved as a proportion. 13
Example Express — as a percent.
Step 1 Write a proportion. 13 = x 20 100
Step 2 Find the cross products.
1300 = 20x
Step 3 Divide each side by 20. 1330 = ooox 23 23
Practice Problem In one year,73 of 365 days were rainy in one city.What percent of the days in that city were rainy?
Solve One-Step Equations
A statement that two things are equal is an equation. For example, A = B is an equation that states that A is equal to B.
An equation is solved when a variable is replaced with a value that makes both sides of the equation equal. To make both sides equal the inverse operation is used. Addition and subtraction are inverses, and multiplication and division are inverses.
Example 1 Solve the equation x - 10 = 35.
Step 1 Find the solution by adding 10 to each side of the equation. x- 10 = 35 x - 10 + 10 = 35 + 10 x = 45
Step 2 Check the solution.
Both sides of the equation are equal, so x = 45.
Example 2 In the formula a = bc, find the value of c if a = 20 and b = 2.
Step 1 Rearrange the formula so the unknown value is by itself on one side of the equation by dividing both sides by b.
Step 2 Replace the variables a and b with the values that are given.
Step 3 Check the solution.
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