I can use common percentages of a number to solve problems.
I can use common percentages of a number to solve problems.
Efficient - Efficient means working in an organised way without wasting time or effort.
Percentage - A percentage is a proportion of a whole.
Pupils may find calculating 75% of a number difficult.
First focus on teaching one strategy for finding 75% of a number. Pupils may find it easiest to add 50% and 25% together. Show representations of this (e.g. bar models showing the proportion of the whole) alongside calculations.
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50% - $$ {1} \over {2} $$
10% - $$ {1} \over {10} $$
1% - $$ {1} \over {100} $$
1% of 240 - 2.4
50% of 240 - 120
10% of 240 - 24
100% of 205 km - 205 km
50% of 205 km - 102.5 km
10% of 205 km - 20.5 km
1% of 205 km - 2.05 km
one-half - 50%
one-quarter - 25%
one whole - 100%
three-quarters - 75%
25% of 100 - 25
25% of 88 - 22
25% of 200 - 50
25% of 160 - 40
25% of 140 - 35
50 % of 120 km - 60 km
10% of 120 km - 12 km
70% of 120 km - 84 km
20% of 120 km - 24 km
5% of 120 km - 6 km
