15 1/2 (12/5*5/8/(7/17 3/4*2) this question solution
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→At first, we will calculate the LCM of 36 and 42. The prime factorisation is 36 and 42 is,
36 = 2 × 2 × 3 × 3
42 = 2 × 3 × 7
Now, LCM of 36 and 42 = 2 × 2 × 3 × 3 × 7 = 252
5
36
+
6
42
=
5×7
36×7
+
6×6
42×6
=
35
252
+
36
252
=
35+36
252
=
71
252
(ii) 1
2
3
+2
4
5
=
1×3+2
3
+
2×5+4
5
=
5
3
+
14
5
Now, LCM of 3 and 5 is 15.
5
3
+
14
5
=
5×5
3×5
+
14×3
5×3
=
25
15
+
42
15
=
67
15
=
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