what is

5 times 20/25

Just multiply top by top and bottom by bottom

first simplify them as much as possible for ease

20/25=5/5 times 4/5=1 times 4/5=4/5

5=5/1

5 times 4/5=5/1 times 4/5 = (5*4) / (1*5) = 20/5=5/5 times 4/1=1 times 4/1=4

Make 5 a fraction: 5=5/1. Multiply both fractions: 5/1*20/25=100/25, 100/25 simplified is 4/1. 4/1 is the same as 4. Therefore, 5 times 20/25=4