There are 13 full sets of 28 days in a year, plus one day in a normal year or two days in a leap year.
2191 days in 6 years if there is one leap year in the span (the third year), otherwise 2192. (365x6 plus the one or two leap days)
2/63
If only one of them is a leap year, then there are about 2556 days If two of them are leap years, then there are about 2557 days.
One extra day in an 'ordinary' year, two in a Leap Year.
A fraction requires two numbers. 21 days as a fraction of what? A month, a year, a century?
There are 13 full sets of 28 days in a year, plus one day in a normal year or two days in a leap year.
A solstice is the two longest days of the year. One day in summer and one day in winter. An equinox is the two shortest days of the year, one in fall and one in spring.
2/7
Yes there were 52 Wednesdays in 2009. In a regular year there are about 365 days, so there will be one day of the week that will occur 53 times, two days of the week in a leap year. 365 days in a regular year divided by 7 is 52 with a remainder of one, meaning one of the days of the week has to occur an extra time. Leap year has a remainder of two, so two days will occur 53 times.
Saturday and sunday two-seventh of the days
2191 days in 6 years if there is one leap year in the span (the third year), otherwise 2192. (365x6 plus the one or two leap days)
1/21
2/63
There are 365 days to each year, so two years would be 730 days. Then 1,000 days is 2 years 270 days unless one of the years is a leap year, in which case 1,000 days would be 2 years 269 days. Also, 1,000 days would be 1000/365 years or 2 54/73 years (2 270/365 years simplified) or 2.74 years as a decimal fraction, if none of the years are a leap year.
4/15
One year = 52 weeks + 1 or 2 days That is 1 year = approx 52 weeks. So 26 weeks/2 years = 26 weeks/104 weeks = 1/4