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primary 6 | Maths | Percentage
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P6

Date Posted: 3 months ago
Views: 16
snell
Snell
3 months ago
decreased by 30% => 70%
increased by 30% => 130%

70% x 130% = 91%

compared to original area of 100%,
new area of 91% means
decreased by 9%

ans: (1)


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Claudine Lim
Claudine Lim's answer
16 answers (Tutor Details)
1st
tip: percentage decrease already signify (-) so there is no need to put a (-) sign in front of 9%

percentage change is given by the formula (new area-old area)/old area x 100%