1.6 Percentages

Front

PROCESS:
Write a number (A) as a percentage of another (B).

e.g. Write 24 as a percentage of 80

Back

Write A / B x 100%
Put in calculator.

e.g. 24/80 x 100% = 30%

Front

PROCESS:

Turn a decimal into a percentage

Back

Multiply by 100 and add % sign

Front

PROCESS:

Turn a percentage into a decimal

Back

Divide by 100 and remove % sign

Front

PROCESS:

Turn a percentage into a decimal.

e.g. 37.5%

Back

Divide by 100 and simplify using calculator.

37.5% = 37.5 / 100 = 3/8

Front

PROCESS:

Find the percentage of a number

e.g. 20% of 180

Back

Put percentage / 100 x number into calculator

e.g. 20 /100 x 180 = 36

Front

PROCESS:

Percentage change

e.g. Price of a £14 shirt goes up by 22%.

Back

Find percentage of number [percentage / 100 x number] and add to (subtract from for decrease) number

e.g. 22% of 14 = £3.08

14 + 3.08 = £17.08