sstrike's answer to Opportunity's Primary 6 Maths Percentage Singapore question.
I like this chart method but I don't know how to figure it myself when I'm trying out . Thank anyway for sharing. I will try again
If you move the whole blue parts left for 1 unit
The failed for both will be 2 units → 20% failed for both, instead of 10%
So 7-1=6
6 units passed for both
Total → 10 units
The failed for both will be 2 units → 20% failed for both, instead of 10%
So 7-1=6
6 units passed for both
Total → 10 units
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