Steps are simple:
1- Write the standards of conversion
2- Write the value you want to convert
3- Use cross multiplication to get the converted value
Examples:
i- Say we want to convert 890 cm to meters.
We know that 1 cm = 0.01 meters
Now, we will write the number we want to convert and use cross multiplication as follows:
1 cm = 0.01 meters
890 cm = ?? meters
converted value = (890*0.01) / 1 = 8.9 meters
ii- Say we want to convert 568 kg to grams.
We know that 1 kg = 1000 grams
Now, we will write the number we want to convert and use cross multiplication as follows:
1 kg = 1000 gram
568 kg = ?? grams
converted value = (568*1000) / 1 = 568000 grams
Hope this helps :)
