Algebra Demystified 2nd Ed

232 algebra De mystif ieD

PRACTICE

1. 2 is what percent of 5?


2. 5 is what percent of 2?


3. 3 is what percent of 15?


4. 15 is what percent of 3?


5. 1.8 is what percent of 18?


6. 18 is what percent of 1.8?


7. 41 is what percent of 2?


8. 2 is what percent of^14?

✔SOLUTIONS

1. 52
   2
   5

04040

x

x

=

==.%=

2 is 40% of 5.

2. 25
   5
   2

25 250

x

x

=

== =.%

5 is 250% of 2.

3. 15 3
   3
   15

1

5

02020

x

x

=

====.%

3 is 20% of 15.

4. 315
   15
   3

5 500

x

x

=

=== %

15 is 500% of 3.

5. 18 18
   18
   18
   1810
   18 10
   18
   180

01010

x

x

x

x

=

=

=

===

.

.

.( )

()

.%

1.8 is 10% of 18.

PRACTICE

1. 2 is what percent of 5?