A cool question on percent

Algebra Level 1

If 20% of a = b,then b% of 20 is the same as:

20% of a 4% of a 16% of a 5% of a

Saurav Sah by Saurav Sah , 20, India

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

2 solutions

Sunil Pradhan
Apr 16, 2014

20a/100 = b

20% of b = 20/100 × a/5

= 4a/100 = 4/100 × a = 4% of a

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Could you explain why you are concerned with 20% of b?

Guiseppi Butel - 7 years, 1 month ago

b% of 20 = b/100 × 20 = 20b/100 = b × 20/100 = 20% of b

Sunil Pradhan - 7 years, 1 month ago
Azadali Jivani
Aug 11, 2015

Suppose a=100
a * 20/100 = 20=b
20 * 20/100=4
therefore 4 is 4% of a(or 100) (Ans.)
Sol. 2
20% of a = a * 20/100 =a/5 =b
b% of 20 =20 * b/100 =20/100 * a/5 =4/100 *a =4% of a (Ans.)


0 Helpful 0 Interesting 0 Brilliant 0 Confused

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...