Answer:
Each mark on the top of the number line increases by 70, so the second mark is 140. Each mark on the bottom number increases by 20%. So 40% of 350 is 140.
Explanation:
We can see that the number line is divided into 5 equal parts on both the top and bottom.
Let's do the bottom part of the number line first.We can divide 100 by 5 to get what each segment of the total number line is. 100/5=20. Each segment of the bottom number line is 20%. The rest of the bottom number line is adding by 20 until we have reached 100. 20%, 40%, 60%, 80%, 100%.
For the top: Having the bottom part done, we know that each small segment is 20%. We can multiply 350 (the total) by 0.2 which gives us 20% of 350. 350x0.2=70. Each part of the line segment for the top will increase by 70. You can keep adding 70 to each segment, which will fill out the number line just the same. But for more explanation, lets continue filling it out step by step. Now, we can multiply 350 by 0.4 (40%). 350x0.4=140 (part of your final answer). Continue doing so for the rest. An important thing to notice is that the numbers we are multiplying 350 by are all matching the percents that should be filled in at the bottom. 350x0.6=210. That's the third mark. Next, 350x0.8=280. That's the fourth mark. Now, we have 350, which is 100%.
Also, when you're not asked to do a double number line, you can divide the part by the total. 140/350=0.4. 0.4=40%.
Hope this helped.