"More than" can be taken as "that part extra", thus, addition can be helpful. The number which is 0.1 more than 25.78 is given by Option A: 25.88
You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.
The number needed is 0.1 more than 25.78
When we add something to a number(some positive thing), we increase that thing and make it more than what it was before.
The expression "c is a more than b" means c = b + a
(b had to increase by 'a' to get equal to c, so c was already 'a' more than b)
The needed number will be 0.1 + 25.78 = 0.10 + 25.78 = 25.88
Thus, the number which is The number which is 0.1 more than 25.78 is given by Option A: 25.88
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