Sergei says that 10% of a number will always be less than 20% of any other number.

The statement is true sometimes

Step-by-step explanation:

Let

x------> a number

y-----> another number

we have that

----> inequality that represent the situation

Verify

For

substitute in the inequality the values of x and y

-----> is true

For

substitute in the inequality the values of x and y

-----> is not true

Therefore

The inequality is true sometimes