How do you write #-1/8# as a decimal?

1 Answer
Nov 30, 2016

Answer:

#-1/8 = -0.125#

Explanation:

Decimals can be negative or positive. In this case it will be negative.

Find an equivalent fraction with a denominator of a power of 10.
In this case we will use #1000#

#-1/8 xx 125/125 = -125/1000#

This can now be written as a decimal with 3 decimal places (because we have thousandths.)

#-125/1000 = -0.125#

Another method is to divide: #-1 div 8#

#" "-8|ul(1.0^(2)0^(4)0)#
#=" "-0.1color(white)(.)2color(white)(.)5#

It is a huge advantage to know some of the more common fractions, decimals and percents by heart. These include the 'eighths'

#1/8 = 0.125" "3/8 = 0.375" "5/8 = 0.625" "7/8 = 0.875#