Complex sentence: By the end of the war, Canada's war production ranked fourth among the Allies, 70% of Canada's war production by 1945 went to supply the Allies and only 30% was needed for Canada's own military.
Split into simpler sentences: By the end of the war, Canada's war production ranked fourth among the Allies. By 1945,70% of Canada's war production went to supply the Allies and only 30% was needed for Canada's own military.