You line up the decimals and simply subtract. Below is an example.
2.989-1.989= 2.989
1.989
---------
1.000
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You subtract decimals together.
196.45
add them or subtract them, as appropriate!
If you can subtract whole numbers you can subtract decimals. Forget about the decimal for a sec and subtract the numbers as if they were whole numbers. 2.5 -1.4 =1.1 hope this helps and if not yahoo usually has good examples.
fist then the kick then the uppercut