Answer:
Option C
Step-by-step explanation:
When dividing a number by another number that is not completely divisible, for example 10÷4 we start by getting 2 as the divider then remainer from 10-(2*4)=2. The remainder being 2 is not divisible by 4, we introduce a decimal and trailing zero. 20÷4=5 hence the answer of 10÷4 will be 2.5 because it had a remainder and we introduced a trailing zero.