1. 180% of what number is 261?
2. What percent of 689 is 1488.24?
3. 95.12 is 328% of what number?
4. 14 is 20% of what number?
2006-12-07 09:50:07 · 6 answers · asked by Emma aka UMA 2 in Science & Mathematics ➔ Mathematics
This is for my younger friend who needed some help, and wanted to know how to do it, thanks!!!
2006-12-07 14:00:25 · update #1
1) Read the questions caerfully.
Now,
180/100 = 261 /x
180 is to 100 as 261 is to what number?
Use a ratio to compare the two,
26100/180=145
the rest of the questions are the same pretty much
2006-12-07 09:55:18 · answer #1 · answered by heyhelpme41 3 · 0⤊ 0⤋
1. Write this as 1.8*x = 261, so x = 261/1.8
2. 1488.24 = x * 689, so x = 1488.24/689, which will give you a number a little more than 2 (I'll let you use the calculator). But then the percent is x * 100.
3. 95.12 = 3.28*x Divide both sides by 3.28 to get x
4. 14 = .2 * x see #3 - the process is exactly the same
2006-12-07 17:55:32 · answer #2 · answered by firefly 6 · 0⤊ 0⤋
Set up a proportion (for #1)
261 180
__ = ___
x 100
Then cross multiply. and divide.
2006-12-07 17:53:38 · answer #3 · answered by CALiiF0RNiiAxCRAZii 2 · 0⤊ 0⤋
in your browser type in www.quickmath.com
this is a convertor there that all you have to do is put in the numbers and it does all the work for you.
good luck
2006-12-07 18:06:26 · answer #4 · answered by Bird 3 · 1⤊ 0⤋
1. 469.8
2. 54901.1736
3. 311.9936
4. 2.8
trust me, my brother did the math and he is a genius
2006-12-07 17:58:37 · answer #5 · answered by Skittles 2 · 0⤊ 1⤋
1.145
2.I am not sure
3.29
4. 70
2006-12-07 18:01:46 · answer #6 · answered by moon me 2 · 0⤊ 1⤋