2007-06-29 10:07:23 · 8 answers · asked by in love 1 in Science & Mathematics ➔ Mathematics
If that umber is x
METHOD -1
x * 30 /100 = 15
Cross multiply
x = 15 * 100/30
x = 50
METHOD - 2
30/100 = 15/x
Cross multiply
30x = 1500
x = 50
So, 15 is 30% of 50
2007-06-29 10:15:28 · answer #1 · answered by ♥ Ă♫̉ğĕ!̉ ♥ 3 · 0⤊ 0⤋
in love, you can figure these types of problems out for yourself if you always remember in math that "is" means "equal" and "of" means times or multiply. And, what number means the "variable" like n. Now, remember this and you will be able to do many math problems just by rewriting the sentence into its math equal sentence and then doing the math.
It looks like this: 15 = 0.30n.
Divide both sides by 0.30 and you've got your answer.
2007-06-29 10:19:33 · answer #2 · answered by Goldenrain 6 · 0⤊ 0⤋
ratio:
is/of
15/of .30/1
cross multiply
15(1) = .30of
15 = .30of
divide both sides by .3
of = 50
15 is .3 of 50
2007-06-29 10:11:20 · answer #3 · answered by Carmen 4 · 0⤊ 0⤋
Let x = the number
x * 0.3 = 15
x = 15 / 0.3
x = 50
2007-07-03 00:54:06 · answer #4 · answered by Jun Agruda 7 · 1⤊ 0⤋
0.3 X = 15
X = 15 / 0.3
X = 150 / 3
X = 50
15 is 0.3 of 50
2007-07-03 04:45:50 · answer #5 · answered by Como 7 · 0⤊ 0⤋
50
15/.3 = 50
2007-06-29 10:11:16 · answer #6 · answered by Zane Chaos 1 · 0⤊ 0⤋
50
x(.30) = 15
x = 15/.30
x = 50
2007-06-29 10:10:25 · answer #7 · answered by zippythewonderslugohio 4 · 0⤊ 0⤋
15=.3x
x=15/.3
x=50
2007-06-29 10:10:37 · answer #8 · answered by kelsey 7 · 0⤊ 0⤋