Franco read 3/8 of a chapter of his history book in 1/5 of an hour. at this rate, how many chapters of his history book can he read in 1 hour

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?