To the right
Take the number of centimeters, move the decimal point 2 places this way and you have centimeters.
Converting from litres to millilitres you move the decimal 3 places to the right as the number is getting 1000 times bigger (multiply by 1000)
Since there are 100 cm in 1 m, you must divide 12 by 100. This gives you 12/100, which can be reduced to 3/25, or 0.12 in decimal form. Whenever you are converting in metric units, you only have to move the decimal based on the different measurements. In this case, a meter is 100 centimeters, so the decimal is moved two places over. Which direction you move it depends on which way you are converting. Converting from a smaller size to a bigger one requires you to move the decimal to the left, and converting from a larger size to a smaller one requires you to move the decimal to the right, adding zeroes as necessary.
To move the decimal you must move the decimal in the divisor all the way to the right to make it a whole number. Then in the dividend, you move that decimal to the right the same amount of spaces you did in the divisor.
Converting centimeters to meters is done this way: 40 centimeters divided by 100 = 0,4 meters
If you have a decimal, move the decimal point two places that way ---> to get percent.
If you have a fraction, divide the top by the bottom to get the decimal. If you have a decimal, move the decimal point 2 places that way --> to get the percent. If you have percent, move the decimal point 2 places this way <-- to get the decimal.
Left or right.
One kilometer = 1000 meters. To write it another way, 1.000 km = 1000 m Notice that all you had to do here was move the decimal point 3 places. So 1931.21 meters = 1.93121 kilometers.