less than / fewer than (<)
menos de / menor que (<)
is smaller than, written with the symbol <; the number itself is not included (do not confuse with "5 less than x").
Example
"Fewer than 20 people" means p < 20, so 20 is not allowed; 3 < 8 is true.
In Spanish
menos de / menor que (<) — es menor que, se escribe con el símbolo <; el número mismo no está incluido (no lo confundas con "5 menos que x").
"Menos de 20 personas" significa p < 20, así que 20 no se permite; 3 < 8 es verdadero.