Writing Percent Equations

A cell phone company dropped the prices on their phones by 7%. Which equation shows the relationship between the p, the old price of the phones, and n, the new price of the phones?

• p= 0.07n

• p = n - 1.07

• p = n - 0.07

• p = n - 0.07n

Tags

CCSS.8.EE.C.7B

Sam drew a square with each side being exactly 12 centimeters long. If he wanted to make the square 12% larger which expression can he use to find the new sides length?

• 12 x 0.12

• 12+ 1.12

• 12 x 1.12

• 12 + 0.12

Tags

CCSS.7.EE.B.3

Each new rectangle is 21% longer than the original. Write an equation to represent the relationship between the length of an original rectangle, b, and the length of the new rectangle, c.

• c = 1.21b

• c = 1b + 0.21b

• c = (1+0.21)b

• All of the above

Tags

CCSS.HSF-BF.A.1A

Which story matches with the equation c = 1.25b?

• Did you know that if you do not cut hair, it can grow 25% longer in a month?

• My friend always eats 20% of whatever I bring for lunch.

• My phone bill costs 25% less this month than last month.

• A candy bar is now 50% longer than it originally was.

Tags

CCSS.6.EE.B.7

Which story matches with the equation c = 0.80b?

• Did you know that if you do not cut hair, it can grow 25% longer in a month?

• My friend always eats 20% of whatever I bring for lunch.

• My phone bill costs 25% less this month than last month.

• A candy bar is now 50% longer than it originally was.

Tags

CCSS.6.EE.B.7

Which story matches with the equation c = 1.50b?

• Did you know that if you do not cut hair, it can grow 25% longer in a month?

• My friend always eats 20% of whatever I bring for lunch.

• My phone bill costs 25% less this month than last month.

• A candy bar is now 50% longer than it originally was.

Tags

CCSS.6.EE.B.7

Write a story for the following equation: c = 0.75b

Tags

CCSS.L.1.6

CCSS.L.3.6

CCSS.L.4.6

CCSS.RL.1.4

Jayla's bank account increased by 7% this year. Write an equation to represent the relationship between the amount that Jayla started with, b, and the amount she has now, c.

Tags

CCSS.HSF-BF.A.1A

Do you have any questions on writing equations for percent problems? If so, type them below.

Tags

CCSS.6.RP.A.3C