A 2-column table with 6 rows titled Students with Pets. Column 1 has entries a percent, a percent, a percent, a percent, a percent, b percent. Column 2 has entries c, c, c, c, c, d. Out of 460 students, 60% have pets. Identify the values of a, b, c, and d in the bar diagram representing the situation.

a =
b =
c =
d =