75.24 + N = 8.71 x 8.71
? N = 75.8641 - 75.24
? N = .6241

?36.1/102.4
= ?361/1024
= 19/32

?.289/.00121 = ?.28900/.00121
= ?28900/121
= 170/11

Let ?25/15625 = ?x/30625
Then, 25/15625 = x/30625
? 1 / 625 = x / 30625
? x = (30625 / 625) = 49

Let 1872/?N = 234.
Then ?N = 1872/234 = 8
? N = 8 x 8 = 64

?324/ 1.5 = N / ?256
? 18/1.5 = N/16
? N = (18 x 16) / 1.5 = (18 x 16 x 10) / 15
= 192

Sum of decimal places being equal in Num. and Denom. of given expression
So ,Given expression is equivalent to
?(324 x 81 x 4624) / (15625 x 289 x 729 x 64)
= (18 x 9 x 68) / (125 x 17 x 27 x 8)
= 3/125
= 0.024

Given expression = ?15625 + ?15625/100 + ?15625/10000
= (125 + 125/10 + 125/100)
= (125 + 12.5 + 1.25)
= 138.75

Let , ?1296 / N = N / 2.25
Then, 36/N = N /2.25 or N²= 36 x 225/100
? N = ?(36 x 225) /100 = (6 x 15) / 10 = 9

?.00059049 = ?59049/100000000
= ?59049 / 10000
= 243/10000
= 0.0243