If 28% of a sum is $100.80, what is the sum?
A. $129.02
B. $277.78
C. $282.24
D. $360.00
2007-09-15 18:46:31 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
D
$360.00*.28= 100.80
Or do a portion
28%/100%=100.8/x
The cross multiply
10080=28x
x=360
2007-09-15 18:53:05 · answer #1 · answered by cruelbeliefs 2 · 2⤊ 0⤋
Well if you know that 28%=100.8
You can do a proportion
28%/100%=100.8/x
Cross multiply
10080=28x
x=360
which is D
2007-09-15 18:53:23 · answer #2 · answered by Becky 2 · 0⤊ 0⤋
D
Here's the solution:
let x be the sum...
28x=100.80(100)
x=(100.80/28)(100)
x=360
2007-09-15 18:53:14 · answer #3 · answered by criselda 3 · 1⤊ 0⤋
100/28 * 100.80 (= 360).
So D.
2007-09-15 18:53:52 · answer #4 · answered by tsr21 6 · 1⤊ 0⤋
0.28 S = $ 100.80
S = $ 360
2007-09-15 18:59:51 · answer #5 · answered by CPUcate 6 · 1⤊ 0⤋
360.00
2007-09-15 18:56:24 · answer #6 · answered by Petra 1 · 0⤊ 0⤋