Knightswood Secondary School
Intermediate 1
Unit 1
Homework 1 Basic Calculations
Answer the following questions, showing all your working.
1 Find
a) 16% of £23
b) 17.5% of 80kg
2 a) express £15 as a percentage of £75
b) express 7.5 m as a percentage of 30m
3 Round the following numbers to the nearest hundred.
a) 237
b) 164
c) 1997
4 Round the following numbers to one decimal place.
a)27.81
b) 13.45
c) 19.78
5 If 5 items cost £20 what will 9 items cost?
6 Convert the following into percentages.
a) 1/5
b) 0.7
c) 2/3
7 Calculate the interest on £2500 for 1 year at 3.75% per annum.
8 Of the 860 pupils in Craighead Academy, 473 are girls. What
percentage are girls?
9 42571 supporters turned up to watch the Cup Final. Round this to the
nearest thousand.
10 In a maths exam, Bob scored 37 out of 60. What percentage is this?
Give your answer to 1 decimal place.