$\backslash$table$[[$Group$,\backslash$table$[[$Percent of$],[$income$]]],[$Poorest $20\%,5],[\backslash$table$[[$Second poorest$],[20\%]],10],[$Middle $20\%,15],[\backslash$table$[[$Second richest$],[20\%]],25],[$Richest $20\%,45]]$

The table gives the distribution of income in a given country.

What percent of income is earned by the richest forty percent?

$70$ percent

$20$ percent

$55$ percent

$5$ percent