don steward
mathematics teaching 10 ~ 16

Tuesday, 25 March 2014

'a' to 'b' as a percentage

some justification for the existence of percentages

writing gradients of hills as a percent, as they do on some road signs

the Wrekin is a landmark hill in Shropshire
[the involvement of percentages is spurious but the above is a neat task anyway, from Paul Andrews - when he taught in Shropshire, many moons ago]

this very fine task was contributed by Dan Walker - many thanks to him

it can take students a while to find all the options

there aren't many who can devise an interesting task converting fractions to percents but Dan has managed it

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