Given expression = 3 / [ 3+ {(0.3 - 3.03) / (3 x 0.91)}]
= 3 / [3- { 273 / (3 x 91)}]
= 3 / (3-1)
= 3 / 2
= 1.5

Given expression = (0.01 - 0.0001) / (0.00001 + 1)
= (.0099 / .0001) + 1
= 99 + 1
= 100

The given number are 3.00, 0.09 and 2.70
LCM = LCM of numerator / HCF of denominator
L. C. M of 300, 9 and 270 is 2700
? Required L.C.M = 27.00 = 27

The Given Number are 1.08, .36 and 0.9
G. C. D of 108, 36 and 90 is 18
? Required G. C. D. = 0.18

= 0.136
= (136 - 1) / 990
= 135 / 990
= 3 / 22

Given Exp. = 0.63 + 0.37
= 63/99 + 37/99
= 100 / 99
= 1¹/₉₉
= 1.01

Given Exp= 0.3467 + 0.1333
= (3467 - 34) / 9900 + (1333 -13) / 9900
= 3433 +1320 / 9900
= 4753 / 9900
= (4801 - 48) / 9900
= 0.4801

Given Exp. = 3.57 - 2.14
= 3 + (57 / 99) - 2 - (14 / 99)
= 1 + (57 / 99) - (14 /99)
= 1 + 43/99
= 1.43

Given Exp. = 247 + 353 + 0.05
= 5 + (47 / 99) + (53 / 99) + (05 / 99)
= 5 + (105 / 99)
= 5+1⁰⁶/₉₉
=6⁰⁶/₉₉
= 6.06

4.12 = 4 + 0.12
= 4 + (12 - 1) / 90
= 4¹¹/₉₀