Bought 30 t-shirts at a closing store 20%were blue and .5 of the t shirts were black how many if the shirts were neitger black nor blue

9 shirts

Step-by-step explanation:

0.5 in percentage form is 50%.

50% + 20% is 70%. You want to find out the percentage that represents the neither black or blue, so do 100% minus 70%. 100% - 70% is 30%.

Use this ratio: 30/100 = X/30

Simplify the ratio to: 3/10 = X/30

Cross multiply: 90 = 10X

Divide both sides by 10: 90/10 = 10X/10

                                         9 = X

step-by-step explanation:

ur mom

step-by-step explanation: