Question

adding 20% of x to x is equivalent to multiplying x by which of the
following?

Answer 1

firstly 20% of x so 20x/100
then 20x/100+x=120x/100 or 12x/10 
now 12x/10=1.2x
so it is equivalent to multiply 1.2 to x

Answer 2

Answer:

The 20% of the given number x is equal to the value of multiplying x by 1.2.

To find:

The value to be multiplied by x

Solution:

Given,  

20% of x  

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

Adding 20% of x to x  

$=x+\frac {20x}{100}\\\\= \frac {(100x+20x)}{100}\\\\= \frac {120x}{100}\\\\= \frac {12}{10}\times x\\\\=1.2x$

Hence, adding 20% of the given value x to the number x is equivalent to multiplying x by 1.2.