Fractions

Question 1

How do you add fractions?

Answer 1

Find a common multiple for the denominators, times the numerators by what you multiplied the denominators by, then add the numerators together
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Question 2

How do you subtract fractions?

Answer 2

Find a common multiple for the denominators, times the numerators by what you multiplied the denominators by, subtract the numerators from each other.
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Question 3

How do you multiply fractions?

Answer 3

Times the numerator by the numerator and the denominator by the denominator

Question 4

How do you divide fractions?

Answer 4

Flip the second fraction in a question and times them together

Question 5

How do you find fractions of amounts?

Answer 5

Turn both numbers into a fraction (eg 120 would be 120/1) and times together, then divide the numerator by the denominator

Question 6

How do you express one fraction as a quantity of another? (eg: ‘express 28cm as a fraction of 1.4m)

Answer 6

Convert all numbers to the same units and simplify

Question 7

How do you work out multipliers?

Answer 7

eg: Find the multiplier for 15% increase
100% is being used + 15%
115% as a decimal is 1.15