Answer:

hope it's helpful to you

Step-by-step explanation:

The cost of Mathematics book is Rs 25

4

3

and that of Science book is Rs 20

2

1

. Which costs more and by how much ?

Medium

Solution

Mathematics book costs Rs. 25

4

3

=Rs.

4

103

And Science book costs Rs. 20

2

1

=Rs.

2

41

To compare fractions we first make their denominators equal

For this we take the L.C.M of4 and 2 which is equal to 4

So, we multiply the numerator and denominator by 2 to get

⇒

2×2

41×2

=

4

82

Clearly

4

103

is greater is than

4

82

Hence, Mathematics book costs more than Science book by

4

103

−

4

82

=

4

21

=Rs. 5.25

Answer:

The cost of maths book is more by 3/4

Step-by-step explanation:

Cost of mathematics book=5/4

Cost of science book=1/2

Difference=5/4-1/2

=5/4-2/4

=3/4

The cost of maths book is more by 3/4