4
8
8
20
Two fifths.
two fifths is two parts of 5 or 2/5, first express that as part of 100 (as percents work that way) so 2/5 * 20/20 = 40 / 100. Thus two-fifths is 40 percent.
To find two-fifths of a number, you can multiply the number by 2/5 or divide the number by 5 and then multiply the result by 2.
7/20
four-fifths of 20 is 16.
two-fifths as a percent is 40% because 5 times 20=100 and 2 times 20= 40 and a percent is always over 100!
2/5 of 20 is 8.(2 / 5) * 20 = 8
5/20 + 8/20 = 13/20