Hey there!
The word “of” means “multiply” in mathematics.
15% of 220
= 15/100 * 220
= 15/100 * 220/1
= 3/20 * 220/1
= 3(220) / 20(1)
= 660 / 20
= 660 ÷ 20 / 20 ÷ 20
= 33 / 1
= 33
Therefore, your answer is: 33
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)