Cuánto es 20% de $60
20% es 20/100 mutiplied by $60:
$12 es qué porcentaje de $60
$12 es divided by $60 and multiplied by 100%:
$12 es 20% de what
$12 es divided by 20%:
Cuánto es the percentage change from $40 to $50
The difference between $50 and $40 es divided by $40 and multiplied by 100%:
