Cheat Codes

Question 1

10% Shortcut

Answer 1

Move decimal one left (Ex: 10% of 250 = 25.0)

Question 2

5% Shortcut

Answer 2

Half of 10% (Ex: 5% of 250 = 12.5)

Question 3

1% Shortcut

Answer 3

Move decimal two left (Ex: 1% of 250 = 2.50)

Question 4

2% Shortcut

Answer 4

Double 1% (Ex: 2% of 250 = 5.00)

Question 5

20% Shortcut

Answer 5

Double 10% (Ex: 20% of 250 = 50.0)

Question 6

25% Shortcut

Answer 6

1/4 the number (Ex: 250 ÷ 4 = 62.5)

Question 7

50% Shortcut

Answer 7

Half the number (Ex: 250 ÷ 2 = 125)

Question 8

75% Shortcut

Answer 8

3/4 the number (Ex: 62.5 × 3 = 187.5)

Question 9

15% Shortcut

Answer 9

10% + 5% (Ex: 25.0 + 12.5 = 37.5)

Question 10

30% Shortcut

Answer 10

10% × 3 (Ex: 25.0 × 3 = 75.0)

Question 11

40% Shortcut

Answer 11

10% × 4 (Ex: 25.0 × 4 = 100)

Question 12

Common Decimals: 0.125 , 0.375

Answer 12

0.125 → 1/8 and 0.375 → 3/8

Question 13

Decimal to Percent

Answer 13

Shift decimal 2x to the right (Ex: 0.05 → 5%)