How to turn a fraction into a Percentage?

Today me and the class was learning how to turn any fraction into a percentage %. So what I done was, write the fraction that describes the shaded part. Make an equivalent fraction with a denominator of 10 or 100 then write the percentage shaded. Here is my working : https://watch.screencastify.com/v/LzKWIMrcGBu4rkmFWieh ( you can copy the link) Here is the vedio : https://m.youtube.com/watch?time_continue=8&v=-xCoQ1NrFRk&feature=emb_title ( you can copy link)