Percentage Change 

Brilliant teaching

Thank you, this video is so helpful.

really useful video, thank, you - however, for future ref white on black is very difficult for many of my learners who have dyslexia / dyscalculia

Really helpful TY!

thanks for helping me with my maths homework

I got -0.1% on the last one?

where do you get that calculator from its so cool

☢☢☢☢☣☣☣☣

CENSORED

Umm what sigma

SHAHIR IS GAY