If 170% of a number is 680, what is 50% of the number

200

Step-by-step explanation:

170% of x = 680

Set up an equation:

170/100 • x/1 = 680

1.7 • x = 680

1.7x = 680

x = 400

50% of 400

1/2 • 400 = 200

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5