A number exceeds 20 percent of itself by 40.find the number
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50 is the right answer
birla8:
can you give me the formula
Sure
Now, 20% of ‘x’ in mathematical representation is…(20/100)*x
Now, (20/100)*x is equal to 0.2*x (since 20/100=2/10 which is 0.2)
So, now, we write our original statement of ‘x’ being 40 more than 20% of itself…
x=(0.2*x)+40
x-(0.2*x)=40
x-0.2x=40
0.8x=40 (since,1–0.2=0.8)
x=40/0.8
x=50
So, our answer is 50
Now, (20/100)*x is equal to 0.2*x (since 20/100=2/10 which is 0.2)
So, now, we write our original statement of ‘x’ being 40 more than 20% of itself…
x=(0.2*x)+40
x-(0.2*x)=40
x-0.2x=40
0.8x=40 (since,1–0.2=0.8)
x=40/0.8
x=50
So, our answer is 50
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