Question 64997
In a bag of marbles, 2/5 are red, 2/7 are green, & the rest are blue. What fraction of the marbles are blue?
:
The LCD of 5 and 7 is 35, so there are 35 marbles, all of the marbles is 35/35.
{{{35/35-2/5-2/7}}}
{{{35/35-2*7/(5*7)-2*5/(7*5)}}}
{{{35-14/35-10/35}}}
{{{(35-14-10)/35}}}
{{{highlight(11/35)}}} are blue.
Happy Calculating!!!!