Fractions of an unknown amount - fast math trick

Work out fractions of an unknown amount with this fast math lesson. This lesson explains the role of the denominator and numerator (bottom and top numbers) in a fraction to show how to solve these types of math problems quickly and easily. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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