To multiply fractions, you simply multiply the numerators together and the denominators together. Then, simplify the result to its lowest terms.
a) 1/16
b) 3/16
c) 1/8
d) 3/8
a) 1/16 * 3/16 = (1 * 3) / (16 * 16) = 3/256
b) 3/16 * 1/8 = (3 * 1) / (16 * 8) = 3/128
c) 1/8 * 1/8 = (1 * 1) / (8 * 8) = 1/64
d) 3/8 * 3/8 = (3 * 3) / (8 * 8) = 9/64
So, the products in their lowest terms are:
a) 3/256
b) 3/128
c) 1/64
d) 9/64