What percent of 25 is 10?

10 = p • 25; 40%
10 = p • 25; 250%
25 = p • 10; 40%
25 = p • 10; 250%

Is it A or C? Help please! Thanks!! <3

10 = p • 25

10/25 = p
.40 = p = 40% ,

so a)