Anna, Laura and David each earn the same monthly salary. Each month, Anna saves 19 percent of her salary and spends the rest of it.
Laura spends 17/20 of her salary and saves the rest of it.
Amount of salary David saves : amount of salary he spends =2:8.
Work out who saves the most of their salary each month.
Show how you got your answer.

Solve the problem by using a venn diagram a group of students were surveyed about their taste in music.they were asked how they like three types of music: rock, country western and jazz.the results are summarized below: no one dislikes all three types of music.six like all three types of music.eleven don’t like country western.sixteen like jazz.three like country western and jazz, but not rock.six don’t like rock.eight like rock and country western.seven don’t like jazz.how many students were surveyed?