SSAT数学the price of a cold roast beef lunch is $4.80 and the price of a hot roast beef lunch is $5.40.If both prices include 20 percent for tax and tip,what is the difference in price before tax and tip?
问题描述：
SSAT数学
the price of a cold roast beef lunch is $4.80 and the price of a hot roast beef lunch is $5.40.If both prices include 20 percent for tax and tip,what is the difference in price before tax and tip?
答
（5.4-4.8）/(1+20%)=0.5