Interest = Starting amount of money x Interest rate per year (decimal) x Time the money is invested

Compound Interest: amount changes depending on how much you earnt on top of that

4 of 8

Direct Proportion

1 loaf = 75p

4 loaves = £3

5 pck = £50

3 pck = £30

5 of 8

Ratio

Ratio: relationship between two numbers indicating how many times the first number contains the second. For example, if a bowl of fruit contains eight oranges and six lemons, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ratio 4:3).

1:12 = 2:24 = 3:36 = 4:48 = 5:60

6 of 8

Percentage Increase/Decrease

ACTUAL CHANGE ÷ ORIGINAL X 100

7 of 8

Dividing and Multiplying Fractions

To divide: turn the fraction upside down and multiply. It works with all fractions. For example dividing by ^{2}/_{3} is the same as multiplying by ^{3}/_{2}. Notice that when you divide by a fraction the answer is larger than the number you started with.

To multiply: Simplify the fractions if not in lowest terms. Multiply the numerators of the fractions to get the new numerator. Multiply the denominators of the fractions to get the new denominator.

## Comments

No comments have yet been made