I never saw much point in giving the answer to a mathematical question if the person didn't explain how to get to that answer.
With calculators today many mathematical equations are easy to figure, but I am a strong believer in the person understanding the formula and how it works, not just typing numbers into a calculator and magically getting an answer.
The question is what is 20% of $12,100. First we must change the percentage to a decimal, this is easily done by moving the decimal place to spaces to the left (the % represents the decimal). Therefore it gives us .20
Then simply multiply $12,100 x .20
12,100 x .20 = 2,420
Since we know we are dealing in dollars the answer is $2,420
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20% x $12 100
=$2420
Twelve thousand five hundred dollars = $12,500
12 thousand + 12 hundred + 12 = 13,212
Twelve hundred dollars is written as $1,200
Two hundred twelve thousand, five hundred.
TWELVE THOUSAND SIX HUNDRED PESOS ONLY