It is: 40/50 times 100/1 = 80%
40/50 = 80/100 = 0.80 The decimal form is what you get when you type 40/50 in your calculator
The percentage of 40 that is 20 is 50%.
4/5
25/40
4/5
Dividing both by 10, you get 4/5 which is in its simplest form.
4 over 5
40/80 = 40/80 * 100% = 50%
20 as a percentage of 50 is 40%
20/50 = 40/100 = 40%
40/80 simplifies to 1/2, or 0.5 as a decimal, and 50% as a percentage.