Question

Express -3/8 as a rational number with denominator = 40

Answer 1

Answer:

-15/40

Step-by-step explanation:

multiply numerator and denominator with 5 so that our denominator will be 8*5=40

that is,-15/40

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Answer 2

Given,

• The rational number -3/8 is given.

To find,

• We have to express -3/8 as a rational number with a denominator = 40.

Solution,

We can simply express -3/8 as a rational number with a denominator = 40.

We have the fraction -3/8 and we have to express -3/8 in such a way that the denominator is 40.

Let the numerator be x whose denominator is 40.

Then,        -3/8  = x/40

         By cross multiplying, we get

             -3 *40 = x *8

                -120 = x*8

             -120/8 = x

                -15   = x

∴The numerator is -15 whose denominator is 40.

Then the fraction is -15/40.

Hence, -3/8 can be expressed as -15/40 with a denominator = 40.