20
Number decreased by 20% gives 480. The number is:
- A500
- B600
- C550
- DNone of these
Correct answer: B
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0
CCommunity
600
NA
NA
0
CCommunity
Solution;
Let us take the unknown number as 'x'.
Given :
x - 20% of x = 480
x - (20/100)(x) = 480
x [1 - (20/100)] = 480
x [ (100 - 20)/100 ] = 480
x [ 80 /100 ] = 480
x [4/5] = 480
x = (480 × 5)/4
x = (120 × 5)
x = 600
So, the number is 600.
The correct option is B). 600
Let us take the unknown number as 'x'.
Given :
x - 20% of x = 480
x - (20/100)(x) = 480
x [1 - (20/100)] = 480
x [ (100 - 20)/100 ] = 480
x [ 80 /100 ] = 480
x [4/5] = 480
x = (480 × 5)/4
x = (120 × 5)
x = 600
So, the number is 600.
The correct option is B). 600
0
CCommunity
600*(20/100)=120
480+120=600
480+120=600