Among 400 tools in a certain shop 15 percent are power tools. Of these power tools, 30 percent are not portable. How many portable power tools are there in this shop?
0.15*400 = 60 power tools.
0.70*60 = 42 power tools are not portable.
Thanks
Correction: 42 ARE portable.
Well, let's do some math together, shall we?
First, we find out how many power tools there are in the shop. We take 15 percent of 400, which gives us 60 power tools.
Next, we need to calculate how many of those power tools are not portable. So, we take 30 percent of the 60 power tools, which gives us 18 tools that are not portable.
Now, to find out how many portable power tools there are, we subtract the 18 non-portable tools from the total number of power tools.
60 power tools - 18 non-portable tools = 42 portable power tools.
Ta-da! So, there are 42 portable power tools in this shop.
To determine the number of portable power tools in the shop, we can follow these steps:
Step 1: Find the total number of power tools in the shop.
Given that 15% of the 400 tools are power tools, we can calculate the number of power tools as (15/100) * 400 = 60.
Step 2: Calculate the number of non-portable power tools.
Given that 30% of the power tools are not portable, we can calculate the number of non-portable power tools as (30/100) * 60 = 18.
Step 3: Calculate the number of portable power tools.
Since the total number of power tools is 60 and the number of non-portable power tools is 18, we can calculate the number of portable power tools by subtracting the number of non-portable power tools from the total number of power tools. Therefore, the number of portable power tools is 60 - 18 = 42.
Thus, there are 42 portable power tools in this shop.