How do you add and subtract fractions?

Scott needs to buy a textbook for his college class. The book costs $221 new. He found a slightly used one online for $201. What percent of the $221 (the new cost) will he save if he buys the used book?

Are horizontal and vertical cross sections of a pyramid the same? Try and explain in 2 - 4 sentences

Whats 4/5*4/9 can it be simplify

A regular pentagon has an apothem measuring 3 cm and a perimeter of 21.8 cm. What is the area of the pentagon, rounded to the nearest tenth?

When you divide 7.7 by 700 how many decimal places will the quotient have?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.