Adam got 56 out of 84 correct in his test. What fraction of the marks did he get wrong? Give your answer in its simplest form.
2 answers:
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Answer:
The fraction will increase by 100%
Step-by-step explanation:
Say the fraction is x/y. The question is telling us to decrease x by 20% (i.e. 0.8x) and to decrease y by 60% (i.e. 0.4y):
You can see that by applying these changes, the new fraction is actually double the old fraction (i.e. will increase by 100%).