Are there more microseconds in a second than the number of seconds in a year ?

One microsecond is________ of a second.

The total number of seconds in one year = __________.

Of the three numbers, the average of the first and the second is greater than the average of the second and the third by 15. What is the differnce between the first and the third of the three numbers?

Given are there numbers. If the second and the third numbers respectively are 20% and 50% more than the third number, then what percentage is the first of second ?