James ate 3/4 of his quesadilla. davud ate 2/3 of his quesadilla. both are the same size. who ate more of his quesadilla?

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

Having a hard time understanding this question (see attachment).