# Some important points you should know about Decimals

Some times, you have to  convert or express the given percentages in the form of decimals. It is not such a difficult task as we think. Have a look at the following.

1% = 1/100 = 0.01   (if two zeros are given, just move the decimal pointer two places left)
2% = 2/100 = 0.02 = 1/50 (the simplification of 2/100)
3% = 3/100 = 0.03
4% = 4/100 = 0.04 = 1/25
5% = 5/100 = 0.05 = 1/20
6.25% = 6.25/100 = 0.0625 = 1/16
7% = 7/100 = 0.07
7.5% = 7.5/100 = 0.075
10% = 10/100 = 0.1 = 1/10
12.5% = 12.5/100 = 0.125 = 1/8
20% = 0.2 = 1/5
21% = 0.21
25% = 0.25 = 1/4
30% = 0.3 = 3/10
33.33% = 33.33/100 = 0.3333 = 1/3
37.5% = 0.375 = 3/8
40% = 0.4 = 2/5
50% = 0.5 = 1/2
60% = 0.6 = 3/5
62.5% = 0.625 = 5/8
66.66% = 66.66/100 = 2/3
75% = 0.75 = 3/4
80% = 0.8 = 4/5
87.5% = 0.875 = 7/8
100% = 1
125% = 1.25 = 1 1/4
150% = 1.5 = 1 1/2
200% = 2

1. 1. make the decimal "hop"
since there are 2 0s,hop the decimal from its current position to next-to-6
hop it again to next-to-2.
so we get 62.5

2. 3. 4. thanks for provide us all tricks

5. I appreciate your work. You have provided us a platform where we can learn many thing related to Competition Exams..Really this is very good efforts to provide us good material..

I am Thankful to you..

I have some tricks of Maths calculation of squares.

regards,
Ashish

1. You are always welcome to share your tricks with us Ashish. You can mail us to "Gr8AmbitionZ(at)Gmail.com"

Thanks for the concern :)

6. i like the 'decimal hop' technique,its easy to use wen one is able 2 visualize it.i mean shifting the decimal by the number of places which is equal to the number of zeros,to left or to the right depending on wether we are multiplying or dividing.
like,
6.25 * 100=625 means we will hop the decimal 2 times(as number of zeros=2) to the right(as we are multiplying)
62.5/100=0.625 means we will hop the decimal 2 times(as number of zeros=2) to the left(as we are dividing)

1. Thnx Maggie

7. thanx madam,but madam can you please clear my doubts i have doubts in 12.5%,33.33% & 66.66% can u please explain me these three?

1. any way X%means X/100 So
12.5% = 12.5/100=>0.125
33.33%= 33.33/100=>0.3333
and is also same...........