A rectangular allotment is divided into 15 identical rectangular plots. 9 of the plots are planted with herbs. What fraction of the allotment is not planted with herbs? Express your answer in the simplest form.
- 6/9
- 3/5
- 6/15
- 2/5
Need a hint?
Count the plots that are not planted first, then compare them with the total number of plots, not the planted ones.
Worked answer
- Total plots = 15.
- Plots not planted with herbs = 15 − 9 = 6.
- Fraction not planted = 6/15.
- Divide numerator and denominator by 3: 6/15 = 2/5.
The mistake this question tests
Simplest form in final fraction answers
Pupils compare the 6 unplanted plots with the 9 planted plots instead of the 15 plots in the whole allotment.
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