1 x 101, 101 x 1 = 101
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To find the sum of the first 100 integers, you first add 1 plus 100 (the first and last numbers of the set) and get 101. Do the same with the next two integers, 2 and 99 and you'll get 101. Since you are adding two integers at a time and there are 100 integers between 1 and 100, you'll get 101, fifty times. Therefore, a shortcut would be to simply multiply 101 times 50 and get 5,050.
101 is a rational number. It can also be written as 101/1
101% = 1.01 = 101/100
101
101% of 775= 101% * 775= 1.01 * 775= 782.75