Plzzzzzzz me and tell me how to work it out

To find decimal and percent, we have to simplify the denominator to 100. To do this, we divide both sides by 2:

3/200 = 1.5/100

The decimal would be 0.015, and the percent would be 1.5%

3x + 9 = 45

Step-by-step explanation:

3 shirts at x dollars each cost 3x

lunch costs 9

altogether she spent 3x + 9

she spent 45

3x + 9 = 45