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2 years ago

the number 360 is increased by 25% . the result is then decreased by 50% . what is the final number ?

2 answers:

7 0

Increased by 25%
25%=0.25
increased by 25% means 360+(360 times 0.25)=360+90=450

decreased by 50%
450 times 0.50=225
450-225=225

answer is 225

kap26 [50]2 years ago

3 0

25%=.25
360×.25=90
360+90=450
50%=.5
450×.5=225
225 is the final number

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<h3>Solution:</h3>

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We can solve this by setting up a ratio comparing the height of the tree to the height of the another tree and shadow of the tree to the shadow of the another tree

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Let us assume,

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Set up a proportion comparing the height of each object to the length of the shadow,

$\frac{\text {height of tree}}{\text {length of shadow of tree}}=\frac{\text { height of another tree }}{\text { length of shadow of another tree }}$

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Substituting the values we get,

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