这题是什么意思呀？求助

下面这题如何理解并求借呀？

Which of the following fractions has a decimal equivalent that is a terminating decimal?

a. 10/189

b. 15/196

c. 16/225

d. 25/144

e. 39/128

分母只要是單純由2 or 5組成的

一定是有限小數