The number between 6.45 and 6.5 is 6.475 or as a fraction 259/40
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6/45 = 2/15
645 rounded to the nearest hundred is 600.
0.645 written as a fraction would be 645/1000, which reduces to 129/200.
129/200 is 645/1000 in simplest form. Math: 645/1000 -> 129/200
Let the two numbers be represented by 'a' and 'b'. Then, a + b = 645 And a - b = 151............adding these two eqations together gives :- 2a = 796 : a = 398..........and b = 645 - 398 = 247 (or b = 398 - 151 = 247).