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How to multiply by 12.5%
Divide by 8
How to multiply by 2.5%
Divide by 40 (divide by 10 then by 4 or reverse)
How to multiply by 0.5%
Divide by 200 (divide by 100 then by 2 or reverse)
How to multiply by 0.1%
Divide by 1000
How to multiply by 33%
Divide by 3
How to multiply by 16.6%
Divide by 6 (by 3 then by 2)
16% of 25M
4M (percentage swap –> 25% of 16 since 25 is a clean number and 16 isn’t)
12% of 50B
6B (percentage swap to do 50% of 12B)
28% of 50M
14M (percentage swap)
45% of 120M
54M (half and swap)
How to multiply by 5%
Multiply by 2, then divide by 10 (or reverse order)
How to multiply by 50
Divide by 2, multiply by 100
How to multiply by 500
Divide by 2, multiply by 1000
How to multiply by 2.5
Divide by 4 then multiply by 10
How to multiply by 250
Divide by 4, multiply by 1000
How to multiply by 2.5%
Divide by 4, then divide by 10
Two methods for multiplying by .75
Method 1:
n/4 then multiply by 3
Method 2:
Subtract 1/4 of n from n
(b/c factorization is 3/4 * 10)
How to multiply by 7.5
Subtract a 1/4 of n from n, then multiply by 10
b/c factorization is (3/4 *10
How to multiply by 75
Subtract a 1/4 of n from n, then multiply by 100
b/c factorization is 3/4 * 100
How to multiply by 750
Subtract 1/4 of n from n, then multiply by 1000
b/c factorization is 3/4 *1000
How to multiply by 0.075
Subtract 1/4 of n from n, then divide by 10
How to multiply by 1.5
( N/2 + N )
How to multiply by 15
( N/2 + N ) * 10
How to multiply by 150
( N/2 + N ) * 100
How to multiply by 1500
( N/2 + N ) * 1000
How to multiply by .15 or 15%
( N/2 + N ) / 10
86 * 0.15
12.9
4 * 15
60
21 * 150
3150
56 * 1500
84000
42 * 1.5
63
29 * 0.15
4.35
46 * 15
690
30 * 150
4500
5 * 1500
7500
72 * 1.5
108
21 * 0.15
3.15
96 * 15
1440
17 * 150
2550
79 * 1500
118500
6 * 1.5
9
45 * 0.15
6.75
85 * 15
1275
68 * 150
10200
35 * 1500
52500
7 * 1.5
10.5
5 * 0.15
0.75
85 * 15
1275
93 * 150
13950
4 * 1500
6000
57 * 1.5
85.5
93 * 0.15
13.95
58 * 15
870
60 * 150
9000
49 * 1500
73500
9 * 1.5
13.5
31 * 0.75
23.25
75 * 7.5
562.5
85 * 75
6375
37 * 750
27750
87 * 7500
652500
12 * 0.75
9
35 * 7.5
262.5
17 * 75
1275
30 * 750
22500
17 * 7500
127500
33 * 0.75
24.75
50 * 7.5
375
50 * 75
3750
15 * 750
11250
89 * 7500
667500
28 * 0.75
21
20 * 7.5
150
4 * 75
300
88 * 750
66000
26 * 7500
195000
46 * 0.75
34.5
21 * 7.5
157.5
31 * 75
2325
14 * 750
10500
45 * 7500
337500
83 * 0.75
62.25
61 * 7.5
457.5
71 * 75
5325
12 * 750
9000
48 * 7500
360000
29 * 0.75
21.75
44 * 7.5
330
13 * 75
975
30 * 750
22500
24 * 7500
180000
85 * 0.25
21.25
23 * 0.025
0.575
82 * 25
2050
50 * 2.5
125
6 * 250
1500
20 * 2500
50000
43 * 0.25
10.75
64 * 0.025
1.6
89 * 25
2225
5 * 2.5
12.5
13 * 250
3250
72 * 2500
180000
72 * 0.25
18
38 * 0.025
0.95
52 * 25
1300
7 * 2.5
17.5
58 * 250
14500
43 * 2500
107500
18 * 0.25
4.5
51 * 0.025
1.275
74 * 25
1850
68 * 2.5
170
42 * 250
10500
38 * 2500
95000
14 * 0.25
3.5
86 * 0.025
2.15
63 * 25
1575
77 * 2.5
192.5
85 * 250
21250
7 * 2500
17500
74 * 0.25
18.5
78 * 0.025
1.95
55 * 25
1375
46 * 2.5
115
63 * 250
15750
64 * 2500
160000
36 * 0.5
18
38 * 0.05
1.9
51 * 5
255
82 * 50
4100
40 * 500
20000
73 * 5000
365000
86 * 0.5
43
85 * 0.05
4.25
14 * 5
70
7 * 50
350
24 * 500
12000
9 * 5000
45000
64 * 0.5
32
74 * 0.05
3.7
63 * 5
315
35 * 50
1750
7 * 500
3500
87 * 5000
435000
70 * 0.5
35
82 * 0.05
4.1
9 * 5
45
43 * 50
2150
25 * 500
12500
8 * 5000
40000
61 * 0.5
30.5
51 * 0.05
2.55
46 * 5
230
35 * 50
1750
83 * 500
41500
58 * 5000
290000
38 * 0.5
19
57 * 0.05
2.85
49 * 5
245
86 * 50
4300
12 * 500
6000
28 * 5000
140000
24 * 0.5
12
17 * 0.05
0.85
59 * 5
295
51 * 50
2550
62 * 500
31000
80 * 5000
400000
60 * 0.5
30
19 * 0.05
0.95
75 * 5
375
86 * 50
4300
55 * 500
27500
82 * 5000
410000
19 * 0.5
9.5
88 * 0.05
4.4
44 * 5
220
60 * 50
3000
57 * 500
28500
12 * 5000
60000
38 * 0.5
19
69 * 0.05
3.45
53 * 5
265
31 * 50
1550
23 * 500
11500
6 * 5000
30000
15 * 10
150
14 * 11
154
15 * 13
195
13 * 13
169
12 * 8
96
13 * 12
156
14 * 8
112
13 * 14
182
12 * 13
156
12 * 7
84
14 * 15
210
12 * 9
108
14 * 10
140
15 * 18
270
12 * 12
144
15 * 12
180
11 * 12
132
13 * 7
91
12 * 14
168
13 * 8
104
14 * 14
196
13 * 9
117
12 * 10
120
13 * 15
195
14 * 12
168
15 * 11
165
12 * 11
132
12 * 15
180
13 * 11
143
15 * 9
135
14 * 7
98
14 * 9
126
15 * 7
105
15 * 8
120
15 * 14
210
15 * 15
225
13 * 10
130
14 * 13
182
15 * 16
240
