Question

Tell what number you must divide to get 180 to get 1.8.

Answer 1

We can make this easier by moving the decimal point in both numbers to the right once.

180. ⇒ 1800.
1.8 ⇒ 18

Now, just using mental math, we know that 18 * 100 = 1800 because the two zeroes in 100 add two zeroes to 18 in 1800.

You must divided 180 by 100 to get 1.8