Mental Math - Percent of a Number
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10% of 5 =
0.5
10% of 10 =
1
10% of 12 =
1.2
10% of 15 =
1.5
20% of 50
10
25% of 400
100
20% of 60
12
70% of 200
140
30% of 50
15
20% of 85
17
20% of 90
18
60% of 300
180
10% of 20 =
2
10% of 25 =
2.5
10% of 200 =
20
40% of 50
20
70% of 300
210
30% of 9000
2700
40% of 700
280
10% of 30 =
3
5% of 60
3
30% of 12
3.6
10% of 300 =
30
10% of 400 =
40
70% of 60
42
10% of 450 =
45
80% of 60
48
10% of 50=
5
10% of 500 =
50
10% of 60 =
6
10% of 600 =
60
10% of 700 =
70
10% of 85 =
8.5
1% of 8000
80
10% of 8000
800
10% of 8000 =
800
90% of 90
81
10% of 90 =
9
20% of 450
90
10% of 9000 =
900
