What is 10 percent of 35 cents?

3.5 cents

In order for the school to make a 10% profit from the pen (which is what I'm assuming you're asking; to answer your direct question, 10% of 35 cents is 3.5 cents), the pen must be sold for 38.5 cents. But since half-cents are not allowed, it should be sold for 39 cents, or $0.39.

How it was calculated: Multiply the original price by 1.10, because a 10% profit is desired. If a 55% profit were desired, we would multiply it be 1.55, and if a 47% profit, by 1.47.

We don't deal with fractional cents, so we round up.

35*.1= 3.5

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10%=10/100=0.1
35*0.1=3.5

35 x 10%
= 35 x 10/100
= 35 x 1/10
= 35/10
= 3.5
= 4 cents (rounded to the nearest integer)

the percentage is .03 cents You take .35 and times it by 10 % equals .03 cents is what the school is making