Это суммарно увеличило мой доход за

Это суммарно увеличило мой доход за эти полгода на 15%, а не на 100%, как было обещано..

Результаты (английский) 1:

It totally increased my income during these six months to 15% instead of 100%, as had been promised..

Результаты (английский) 2:

This total has increased my income for the last six months by 15%, not 100%, as promised ..

Результаты (английский) 3:

This is collectively has increased my income for the six months to 15 %, and not at 100 %, as was promised.