What part of the grid?

What part of the grid?

Pencil and paper
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
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This task is about percentages and decimal fractions.
 
10 by 10 grid shaded with two different patterns
 
a)
What percentage of the large square above is shaded like this stripey shaded sqaure ?
 
 
(A) 1%
(B) 5%
(C) 10%
(D) 15%
(E) None of these. The answer is __________.
 
b)
What percentage of the large square is not shaded in any way?
 
 
(A) 70%
(B) 74%
(C) 79%
(D) 83%
(E) None of these. The answer is __________.
 
c)
What decimal fraction of the large square above is shaded like this drak shaded sqaure?
 
 
(A) 0.7
(B) 0.07
(C) 0.007
(D) 7
(E) None of these. The answer is __________.
Task administration: 
This task is completed with pencil and paper only.
Level:
4
Keywords: 
Description of task: 
Students write amounts shown on a grid as percentages or decimal fractions.
Answers/responses: 
  

Y7 (06/1996)

Y8 (06/1996)

a) C very easy very easy
b) D easy easy
c) B difficult difficult