In math, a percent is nothing but a way of writing a number as a fraction of 100 . it's more often denoted with the sign [%]  .For example, [35] [ %]  (read as "thirty-five percent") is equal to [35 / 100] .In order to convert a percent in to a decimal, fundamentally move the decimal point places to the left that is 0.45.In this section they shall speak about 10 percent of decimal form.                                         
Example issues for 10 Percent in Decimal Form:

Example issue 1:

Write 10 percent in decimal form.

Solution:

Move the decimal point places to the left,

 10 percent is 10 per 100.

Therefore 10 percent can be written as 0.1 in decimal form

So that [10/100] = 0.10 zero after the decimal point has no value..

Also see the given link to know about percent to decimal calculator.

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There you will get good help on Grammar.