2007-12-18 04:17:29 · 8 answers · asked by jessi 1 in Science & Mathematics ➔ Mathematics
80_______100%
30_______x%
80*x = 3000
x = 300/8
x = 37.5%
FCH.
2007-12-18 04:21:31 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Suppose I scored 30 out of 80 in a test.
% mark is given by:-
( 30 / 80 ) x 100 %
( 3 / 8 ) x 100 %
300 / 8 %
75 / 2 %
37 ½ %
Conclusion
Must do better!
2007-12-22 05:03:18 · answer #2 · answered by Como 7 · 0⤊ 0⤋
Let x percent of 80 be 30.
80(x/100)=30
80x=3000
x=3000/80
x=300/8
=37.5 percent of 80 is 30.
2007-12-18 12:24:47 · answer #3 · answered by cidyah 7 · 1⤊ 0⤋
If the unknown is x, then (x/80)*100=30
This gives x as:
x = 80*30/100 = 24
Your answer is 24.
2007-12-18 12:49:32 · answer #4 · answered by Kenny2 3 · 0⤊ 0⤋
Simply divide 30 by 80.
30/80=3/8=.375=37.5%
2007-12-18 12:21:07 · answer #5 · answered by Bushman 2 · 1⤊ 0⤋
Method 1
30/80 x 100%
= 3000/80 %
= 37.5%
Method 2
80y% =30
80y/100 = 30
80y = 3000
y = 3000/80
y = 37.5
2007-12-18 12:37:33 · answer #6 · answered by An ESL Learner 7 · 1⤊ 0⤋
divide 30 by 80
=.375
move the decimal 2 places to right and thats ur answer
37.5%
2007-12-18 12:22:28 · answer #7 · answered by 2Shoes 2 · 1⤊ 0⤋
37.5%
because you divide 30 by 80 and multipy your answer by 100
30 / 80 = 0.375
0.375 x 100 = 37.5%
=]
2007-12-18 12:26:06 · answer #8 · answered by Anna Jayne 3 · 1⤊ 0⤋