S Total amount of tomatoes =56%

So: total amount of S =S tomato ÷56%=0.42÷56%=0.75 (hectare).

A: The total planting area of the three vegetables is 0.75 hectares.

2.S Total amount of cucumber =30%

So S cucumber =S total ×30%=0.25 (hectare)

Similarly, S eggplant =S total × 14%=0. 105 (hectare).

A: The planting area of cucumber is 0.25 hectares and eggplant is 0. 105 hectares.

3.0.42-0.105 = 0.315 hectares.

0.3 15/0.42=0.75=75%

Answer; The planting area of eggplant is 75% less than that of tomato.