after Latoya gave 35% of her allowance to her brother and 25% of her allowance to her sister, she had $12 left. How much was Latoya's allowance?
35% + 25% = 60% of her allowance she gave away...so.....the $12 she had left must represent 40% of her allowance......so.....her total allowance was
$12 / .40 = $30