Which is greater 0.55 or 2/5 or 0.46

2/5 = 0.40
0.46
0.55

So 0.55 has the greatest value

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

What am i doing here. add?