X/0.5 = 24
X/0.5(0.5) = 24(0.5)
X = 12
Answer:
Step-by-step explanation:
Ok do the original price minus the new price. 90-55=35. Divide that by the original number and multiply it by 100 to find the price decrease. 35/90=.3888*100=38.89
Her brother is 8: 8 x 2 is 16, and 16 + 8= 24.