Aptitude 1- Fraction, Addition & Subtraction & Multiplication & Division Unit-1 Dt-06/07/2021, Friday
Part/ Whole this called fraction
Example: 1/4, 4/2, 2 2/4
1/4, N/D
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Fraction 3 Type:
1: Proper Fraction- N<D- Less Than, 2/5
2: Improper Fraction- N>D- Greater Than,5/3
3: Mixed Fraction- Whole/W Proper fraction 2 1/7
Conversion of mixed to improper
+ 3 (2×4)+3 8+3 11
2 ------- = --------------- = --------- = --------- ( Ans)
× 4 4 4 4
Conversion of improper to mixed fraction
2
14/3 = 4------ 3 | 14 | 4
3 | 12 |
--------------
2
Conversion of improper to mixed fraction
5
40/7 = 5--------- 7 | 40 | 5
7 | 35 |
----------------
5
Addition:
4 3 3 |_6,_15_
------- + ------- 2, 5
6 15 LCM of: 3×2×5= 30
4 3
-------- × 30 = 20 ---------- × 30 = 6
6 15
20+6 26 13
------------------ = ------- = ------- ( Ans)
30 30 15
Addition:
3 3 3
------- + ------ + ------ LCM of 7, 13, 11=1001
7 13 11
3 3
------- × 1001= 429, -------- × 1001= 231
7 13
3 429+231+294
------ × 1001= 294 ---------------------------
11 1001
954
= ---------- (Ans)
1001
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Subtraction:
4 2 2 |_12,_ 4,_
-------- - ------- 2 |__6,_2,_
12 4 3, 1
LCM of: 2×2×3=12
4 2
-------- × 12 = 4, ---------- × 12 = 6
12 4
4 - 6 -2 -1
------------- = ------ = ------ (Ans)
12 12 6
Multiply:
2 4 2 × 4 8 1
------- × ------- = ------------- = ------- = ------- (Ans)
4 10 4 × 10 40 5
Divide:
2 4 2 10
------- ÷ ------- = ------- × --------- =
4 10 4 4
2 × 10 20 5
-------------- = -------- = ------- (Ans)
4 × 4 16 4
Divide:
24 14 24 12
-------- ÷ -------- = --------- × --------
10 12 10 14
12 × 6 72
-------------- = -------- (Ans)
5 × 7 35
Divide:
+2 + 2 30 30
4 ---- ÷ 2 ------ = ------- ÷ ---------
× 7 × 14 7 14
30 14
-------- × -------- = 2 (Ans)
7 30














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