Hi 5th Class!
The YouTube link below explains how to change the percentage of a pie-chart into degrees. It may help you with pg. 153 and pg. 154 of your Busy at Maths. Take note: when she finds 50% of 360 - she changes the 50% into a decimal (0.5) and multiplies that by 360. Notice how she writes a dot instead of a multiplication sign? That's ok - that is called a multiplication dot and means to multiply. That is a perfect solution!
We have practised finding this a different way - changing 50% into a fraction (1/2), then dividing by the bottom (360 divided by 2 = 180), and multiplying by the top (180 x 1 = 180). Both methods are perfect so feel free to explore that!
I have also linked a game to get your brain back into the fraction/percentage/decimal frame-of-mind!
If you would like any more help with any of the Maths problems in your Busy at Maths, or your Master Your Maths, please don't hesitate to ask!