When it comes to percentages, numbers do not always add up. A 10% increase followed by a 10% decrease does not get us back the original.

Let the original cost of an item be 100 units.

After a 10% raise, or a raise of 10 units, the new cost of the item is 110 units.

Any percentage that comes next will be based on this new 110 units and not the old 100 units.

After a 10% discount, or a drop of 11 units (this is 10% of 110, which is different from 10% of 100), the discounted price is 99 units.

So, the starting price is 100 units and the final price is 99 units.

This is a 1% drop.

It is because the first 10% acts on the original value while the next 10% acts on the new value and not the original value.

10% of the original value and 10% of the new value do not represent the same values, and as such, we will not get back the original value.

Thank u so much for always helping me out!:)