What is 3.69 divided by 0.3 step by step

Alright, so we have 3.69/0.3. What I personally like to do is expand it so we have whole numbers, so we can multiply the equation by 100/100 to get 
369/30. 

and we know that 30 goes into 300 10 times due to that you simply add another 0. After that, we're left with 369-300=69. We know that 30*2=60, and 69-60=9. Therefore, we can add the 10 and the 2 up to get 12, and the remainder is therefore 9. 

The answer is therefore 12+9/30., or 12+3/10 by simplifying the fraction by dividing both the numerator and denominator by 3

Iwould say they are complementary because that’s the division of a 90 degree angle and it’s split between the middle of them