How do you write 9/20 as a decimal?

2 Answers
Mar 6, 2017

Answer:

#9/20 = 9 -: 20 = 0.45#

Explanation:

Another way to look at this is:

#9/20 = 9/20 xx 5/5 = (9 xx 5)/(20 xx 5) = 45/100 = 0.45#

Apr 2, 2018

Answer:

0.45

Explanation:

#9-:20#

#=> 9/20#

Convert the denominator into powers of 2 and 5.

#=> 9/(2xx2xx5#

#=> 9/(2^2xx5^1#

Now multiply both numerator and denominator with 5 to make the powers of 2 and 5 equal.

#=> (9xx5)/(2^2xx5xx5#

#=> 45/(2^2xx5^2#

You can combine the bases with same powers

#=> 45/10^2#

#=> 45/100#

#=> 0.45#

Hope it helps