Question

a number decreased by 20%gives 80 find the number

Answer 1

Answer:

100

Explanation:

X-20%of X=80

LCM=100

100X/100-20X/100=80

80X/100=80

80X=8000

X=100

Answer 2

Answer:

Number will be 100

Explanation:

Let the number is x

It is given that when number is decreases by 20 % it gives 80 then we have to find the number

When x is decreases by 20 %

$x-\frac{x\times 20}{100}=0.8x$

So $0.8x=80$

x = 100

So number will be 100

When 100 is decreases by 20 % then it will become 100 - 20 = 80 (as 20 % of 100 will be 20 )