2007-08-03 18:26:54 · 8 answers · asked by brewer37 1 in Science & Mathematics ➔ Mathematics
the number time 0.8
ex. 200x 0.8 = 160
2007-08-03 18:33:55 · answer #1 · answered by Patricia 2 · 1⤊ 1⤋
Perhaps an example would help.
Example
Find 80% of £500
Method 1
(80 / 100) x £500 = 80 x £5 = £400
Method 2
(4/5) x £500 = 4 x £100 = £400
Method 3
10%<--->£50
80%<--->£400
Hope these may help.
2007-08-03 20:12:19 · answer #2 · answered by Como 7 · 2⤊ 2⤋
To find 80% of a number, multiply it by 0.8.
For example,
80% of 30 = 30 x 0.8
= 24
80% of 50 = 50 x 0.8
= 40
2007-08-03 18:32:10 · answer #3 · answered by Anonymous · 2⤊ 1⤋
The word "of" means multiply.
80% as a decimal is 0.80.
So, when you state: Find 80% of a number, you alter both into 0.80 * the number.
Example: Find 80% of 10.
0.80 times 10
Answer: 8
2007-08-03 18:33:41 · answer #4 · answered by dwalon2 4 · 2⤊ 1⤋
its same as we do the percentage of marks.
suppose u got 500 marks out of 600
then the % of marks is
*formula*
% = (marks u got/total)x100;
ie. (500/600)x100;
now %of number is:
for example no. is 45;
80% = (y/45)x100;
=>y = (80x45)/100;
'y 'is 80% of no.45;
re place 45 with any no. u will get 80% of that no..
2007-08-03 20:32:22 · answer #5 · answered by sharma r 1 · 1⤊ 2⤋
For me, it is convenient to, subtract 20% from the number!
2007-08-03 22:09:02 · answer #6 · answered by quidwai 4 · 2⤊ 1⤋
multiply it by .8
2007-08-03 18:30:45 · answer #7 · answered by Anonymous · 1⤊ 1⤋
multiply by 0.8
2007-08-03 19:20:49 · answer #8 · answered by +w+a+n+t+e+d 2 · 1⤊ 1⤋