Get your maths on with Bobby Seagull and Susan Okereke! This week they tackle percentages and Bobby's corresponding puzzle has a musical flavour to it. Our guest is science and maths champion Gareth Jones, who you may know as Gaz Top from TV show How 2 or more recently from his podcast Gareth Jones on Speed. He took the time to chat about his love of technology and he even offers up a Maths Fact of his own!