Percentage made easy - Five percentage tricks and shortcuts

Percentage made easy! These five tricks for percentage calculation include working out percentage mentally, percentage increase and decrease and other percentage tricks and shortcuts. To donate to the tecmath channel:https://paypal.me/tecmath To support tecmath on Patreon: https://www.patreon.com/tecmath To buy tecmath mechandise: https://teespring.com/stores/tecmath-store