You must divide.
multiply
divide
Divide
To convert from a larger unit to a smaller unit you would multiply. Ex: 5 km = 5000 m Where 1 km = 1000 m <><><><><> It depends on which factor you are multiplying or dividing by. It can go either way. To convert from ounces to grams, for instance, you can divide by 28.350, or you can multiply by 0.035273.
because you have to multiply to break it down into a smaller number
you divide or multiply
That depends on what you are converting from. If you are converting from larger units, you multiply. If you are converting from smaller units, you divide.
When changing from a larger unit to a smaller unit, there will be more of them, so you will multiply.
When going from larger to smaller measurements, there will be more of them so it is necessary to multiply. 1 meter = 100 centimeters When going from smaller to larger measurements, there will be fewer of them so it is necessary to divide. 100 centimeters = 1 meter
There are two ways that are essentially the same and can be used freely - as long as the two units are of the same dimension (length, mass, time, etc.) of course.First way: MultiplicationYou multiply with the relation between the largerunit and the smaller unit, i.e. with how many of the larger unit that goes per one of the smallerunit.ExamplesIf the smaller unit is m (meter) and the larger is km (kilometer), you multiply by 1/1000 km/m.If the smaller unit is inches (in) and the larger is feet (ft), you multiply by 1/12 ft/in.If the smaller unit is µg (micrograms) and the larger is kg (kilograms), you multiply by 1/1,000,000,000 kg/µg.Second way: DivisionYou divide by the relation between the smallerunit and the larger unit, i.e. with how many of the smaller unit goes per one of the larger unit.ExamplesIf the smaller unit is m (meter) and the larger is km (kilometer), you divide by 1000 m/km to go from meters to kilometers.If the smaller unit is inches (in) and the larger is feet (ft), you divide by 12 in/ft to go from inches to feet.If the smaller unit is µg (micrograms) and the larger is kg (kilograms), you divide by 1,000,000,000µg/kg.
You have to multiply by the conversation ratio.
divide the smaller number by the larger number, and multiply by 100. 60 is 75% of 80.