Grade 4 - Progress in Mathematics

Ratio and Percent

Yo u can use a ratio to compare the number

of violins to the number of trombones.

The ratio of violins to trombones is 6 to 2.

Yo u can write a ratio in three ways.

violins 6 to 2 trombones

violins 6 : 2 trombones

violins^6

violins 2 trombones

The ratio of violins to trombones: 6 to 2 , 6 : 2 , or 
^62 


The ratio of trombones to violins: 2 to 6 , 2 : 6 , or 
^26 

If you write a ratio as a fraction with a denominator

of 100, you can express that ratio as a percent (%).

Write each ratio three ways.

0 1. 4 clarinets to 0 2. 10 oboes to 0 3. 5 cellos to 0 4. 9 bassoons to

1. 7 trumpets 01. 1 piano 01. 8 tubas 01. 6 saxophones

Write each ratio as a percent.

0 5. 
 150 
^000 6. 
 1100 
 0 7. 
 1705 
 0 0 8. 25: 100 0 9. 99 :100

Write each percent as a fraction.

10. 30% 11. 5% 12. 62% 13. 48% 14. 150%

When you write a ratio,

be sure to write

the numbers in the

correct order.

fraction: 
 1

8

00 

 1

1

0

0



 0 1

8

0

5



 0

1

1

0

0

0


 0

percent: 8% 10% 85% 100%

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