First thing you could do is use a calaculator multiplying 125 by .55
or
You could use .55 as a fraction which is 11/20 and multiply it by 125 as a fraction which is 125/1
And you should get 68.75
55% of 125 is 68.75 because 55/100 or 0.55 times 125 equals 68.75.
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