1 and 2/3 per salad 1 and 1/2 salad eaten then 2 and 7/10 salad eaten subtract salads eaten 1 and 1/2=1 and 5/10 2 and 7/10-1 and 5/10=1and 2/10=1 and 1/5 convert to improper fraction 6/5=salads eaten
so 1 and 2/3 to imporper is 5/3
so multiply amount per salad by salad eaten 5/3 times 6/5=30/15=2 answer is 2 more tomatoes