Which fraction has a terminating decimal as its decimal expansion? 1.one third 2.one fifth 3.one seventh 4.one ninth

'One third' as a decimal is 1 ÷ 3 = 0.333333 ⇒ The decimal is recurring

'One fifth' as decimal is 1 ÷ 5 = 0.2 ⇒ The decimal terminates at the tenth value

'One seventh'  as decimal 1 ÷ 7 = 0.142857142857 ⇒ The decimal is recurring for every digit between 1 and 7

'One ninth' as decimal 1 ÷ 9 = 0.111111 ⇒ The decimal is recurring 

one fifth