CK12 - Geometry

Everything

a) Whatis the ratio of the numberof cinnamonraisinbagelssold to the numberof plainbagelssold?

Ratioof cinnamonraisinto plain= , , or to.

Note:Dependingon the problem,ratiosare oftenwritteninsimplestform. In this case the ratio can be reduced

or simplifiedbecause.

b) Whatis the ratio,in simplestform,of the numberof wholegrainbagelssoldto the numberof
"everything"bagelssold?

Ratioof wholegrainto everything= , or to.

c) Whatis the ratio,in simplestform,of everythingbagelssold to the numberof wholegrainbagelssold?

Answer:This ratio is just the reciprocalof the ratio in b. If the ratio of wholegrainto everythingis,

, , or to , then the ratio of everythingto wholegrainis, , , or to.

d. Whatis the ratio,in simplestform,of the numberof sesamebagelssold to the total numberof all bagels
sold?

First find the total numberof bagelssold:.

Ratioof sesameto total sold = , , or to.

Notethat this also meansthat , or , of all the bagelssold weresesame.

In somesituationsyou needto writea ratio of morethan two numbers.For example,the ratio,in simplest
form,of the numberof cinnamonraisinbagelsto the numberof sesamebagelsto the numberof garlic

bagelsis (or beforesimplifying).

Example 2

A talentshowfeaturesonly dancersand singers.

• The ratio of dancersto singersis.


• Thereare performersin all.

How manysingersare there?

Thereis a wholenumber so that the total numberof eachgroupcan be representedas

,.