This task comes from the CSMS Fractions (3 and 4) Test. It was given to a representative sample of over 200 Year 9 students in 1976/7 and to a similar sample in 2008/9. It was answered correctly by 57% of the sample in 1976/7, but by only 29% in 2008/9.
Decimalisation? Growing use of calculators?
add a skeleton here at some point
2 months ago