Question

Which of the following has a terminating decimal expansion.
1)32/91
2)19/80
3)23/45
4)25/42​

Answer 1

Answer:

2)19/80

denominator is in the form of 2n5n

Answer 2

the denominator of a rational number which is in the form of

${2}^{m} \times {2}^{n}$

has a terminating decimal expansion

your answer b 19/80

as 80 it can be written in the form of 2⁴×5¹