3. If \( x \) represents a number, does \( \frac{2}{5} \cdot x \) always represent \( 40 \% \) of that number?
Solución de tutoría real
Responder
Solución
¡Inicia sesión para desbloquear respuestas gratis!
Una plataforma de aprendizaje en la que confían millones de estudiantes y profesores reales.
Revisado y aprobado por el equipo de tutoría de UpStudy
Bonus Knowledge
No, \( \frac{2}{5} \cdot x \) does not always represent \( 40\% \) of \( x \), but it actually does! This is because \( 40\% \) can be written as a fraction: \( \frac{40}{100} \) which simplifies to \( \frac{2}{5} \). So, multiplying any number \( x \) by \( \frac{2}{5} \) will give you \( 40\% \) of that number. To further clarify, when calculating percentages, it’s essential to convert the percentage to a fraction or decimal. For example, the percentage \( 40\% \) as a decimal is \( 0.4 \), and as a fraction, it’s \( \frac{2}{5} \). This conversion helps avoid common mistakes when manipulating numbers in different formats, ensuring accuracy in calculations!