When rounding 21.45 to the nearest whole number, you look at the digit in the tenths place, which is 4. Since 4 is less than 5, you round down. Therefore, 21.45 rounded to the nearest whole number is 21.
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2.145 = 2145/1000 = 429/2002.145 = 2145/1000 = 429/2002.145 = 2145/1000 = 429/2002.145 = 2145/1000 = 429/200
There are three feet in one yard, so: 2145/3 = 715 There are 715 yards in 2145 feet.
132/2145 = 4/65
20000
LCM(11, 13, 15) = 2145