How to solved percentages?

What does x mean in math

Carly has 9 pennies jack has 4 times as many pennies as Carly. How many pennies does jack have?

out of the people who have already signed up for a genetics lecture 6 poeple have brown eyes while 10 people do not. considering this data how many of the next 8 people to sign up should you expect to be brown eyed?

What is 4 divided into 3 1/3

Juan is making a college and puts together a circle made out of various pieces of construction paper. The circle has a diameter of 40 cm. What would he estimate for the area of his circle

A grocery store sells three different quantities of sugar. A 1 pound bag cost $1.10, a 2pound bag cost $1.98, and a three pound bag is $2.85. Describe how the unit cost changes as the quantity of sugar increases.

Alana spent 0.35 of a dollar on a ring at the arcade and 0.72 of a dollar on a snack. Did Alana spend more on the ring or the snack

Raven wants to plant 35 marigold plants, 20 zinnia plants and 15 daylily plants in her flower garden. If she puts the same number of plants in each row and if each row has only one type of plant, what is the greatest number of plants she can put in

In a group of 100 adults, 75 percent of the women are left-handed. if there are 12 right-handed women in the group, how many men are in the group?

recipe calls for 2 2/4 cups of raisins but Julie only has one cup 1/4 cup measuring cup how many 1/4 cup does truly need to measure out 2 2/4 cups of raisins