417.

НОД(36;48) = 12

36 = 2 * 2 * 3 * 3

48 = 2 * 2 * 2 * 2 * 3

НОД(35;105) = 35

35 - простое число

105 = 3 * 35

НОД(63;81) = 9

63 = 3 * 3 * 7

81 = 3 * 3 * 3 * 3

НОД(84;154) = 14

84 = 2 * 2 * 3 * 7

154 = 2 * 7 * 11

НОД(625;1000) = 125

625 = 5 * 5 * 5 * 5

1000 = 2 * 2 * 2 * 5 * 5 * 5

418. 25/15 = 5/3;

72/64 = 9/8;

64/40 = 8/5;

300/75 = 4/1;

186/120 = 31/20