Percentages trick

Percentages trick

Find 7 % of 300. Sound Difficult?

Percents: First of all you need to understand the word “Percent.” The first part is PER , as in 10 tricks per list verse page. PER = FOR EACH. The second part of the word is CENT, as in 100. 

Like Century = 100 years. 100 CENTS in 1 dollar… etc. Ok… so PERCENT = For Each 100.

So, it follows that 7 PERCENT of 100, is 7. (7 for each hundred, of only 1 hundred).

8 % of 100 = 8. 35.73% of 100 = 35.73

But how is that useful??

METHOD 1

Back to the 7% of 300 question. 7% of the first hundred is 7. 7% of 2nd hundred is also 7, and 7% of the 3rd hundred is also 7. So 7+7+7 = 21.

If 8 % of 100 is 8, it follows that 8% of 50 is half of 8 , or 4.

Break down every number that’s asked into questions of 100, if the number is less then 100, then move the decimal point accordingly.

EXAMPLES:

8%200 = ? 8 + 8 = 16.

8%250 = ? 8 + 8 + 4 = 20.

8%25 = 2.0 (Moving the decimal back).

15%300 = 15+15+15 =45.

15%350 = 15+15+15+7.5 = 52.5

Also it’s useful to know that you can always flip percents, like 3% of 100 is the same as 100% of 3.

35% of 8 is the same as 8% of 35

METHOD 2

In other words, divide the 'percentage number'

15%500 =  (10%+5% =15%) now 10%500=50 and (10/2 = 5) so 50/2=25  now add both 50+25 = 75 is ur answer

20%490= (10% + 10%).. 49+49 = 98

27.5 %444 = (25% +2.5%).. you just need to shift '.' by one left.. 111+11.1 = 122.1

33% 312= (30% + 3%) or (10+10+10+ 1+1+1) or here its easy to find 3times of 312 = 936 

so that 936 will be 300% and 30% will be 93.6 and 3% will be 9.36

For answer add 93.6 and 9.36 =   104.66