Please help! In middle of test and need answer now

How do you convert 1.27 to a percentage

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?