Find the percent of change. round to nearest tenth, if necessary.

62 is decreased to 52.

28 is increased to 96.

72 is decreased to 45.

55 is increased to 90.

230 is increased to 250.

180 is decreased to 140.

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?

Find the value of the variable and the length of each chord for #5 and #6.