Answer:
2.5 kg = Rs. 101.25
1 kg = (?)
= 101.25 ÷ 2.5
= 40.5 Rs
So, the price of 1 kg sugar will be 40.5 Rs, if 101.25 for 2.5 kg.
I have shown below the formula which will be helpful to you in many ways. If you know it, then it's ok, but if not then you must remember it as it is also useful in daily routine calculations.
Cross multiplication done in this sum:
a = c
b =(?)
(?) = b × c ÷ a
a comes on right and lower side where (?) is there and b comes on upper right side where c is there. In this way, this type of some are done where three values are given and the fourth one is to be found.
In the above sum,
a = 2.5
b = 1
c = 101.25
Explanation: