Ratio and fractions

1 Herearesomecounters.

Completethesentencestodescribethecounters.

a) Thereare countersaltogether.

b) Thereare whitecounters.

c) Thereare blackcounters.

d) 3outofthe8countersare

e) outofthe8countersarewhite.

2 Herearesomeanimals.

Completethesentences.

Forevery cowsthereare sheep.

Theratioofcowstosheepis to

oftheanimalsarecows.

oftheanimalsaresheep.

3 Partofthebarhasbeenshaded.

a) Whatfractionofthebarisshaded?

b) Whatfractionofthebarisnotshaded?

c) Writetheratioofshadedtonon-shadedparts. to

d) Writetheratioofnon-shadedtoshadedparts. to

4 Herearesomeshapes.

a) Whatfractionoftheshapesarecircles?

b) Whatfractionoftheshapesarestars?

c) Whatistheratioofstarstocircles? to

d) Whatistheratioofcirclestostars? to

Canyoufindadifferentanswertoeachofthesequestions?

Comparewithapartner.

©WhiteRoseMaths2019

5 Thebarmodelshowstheratio1to3to4

Talktoapartnerabouthowitshowsthis.

a) Whatfractionofthebarisstriped?

b) Whatfractionofthebarisfullyshaded?

c) Whatfractionofthebarisblank?

6

Whoiscorrect?

Explainyouranswer.

©WhiteRoseMaths2019

7 Scottdrawsabaranddividesitinto8equalparts.

Heshades25%ofthebar.

Whatistheratioofshadedtonon-shadedparts? to

8 Apencilcasecontainsfelttipsandpencils.

38 ofthecontentsarepencils.

Whatistheratiooffelttipstopencils? to

9 Ronhassomelimesandstrawberries.

Theratioofstrawberriestolimesis5to1

a) Howdoyouknowhehasmorestrawberriesthanlimes?

b) Whatfractionofthefruitsarestrawberries?

c) Whatfractionofthefruitsarelimes?

The fraction of brown cubes

is 23 because the ratio of

brown to yellow is 2 to 3

The fraction of

brown cubes is 25

Jack Rosie