20% of all Soviet armored vehicles came from Lend-Lease.
30% of their fighters and bombers were Lend-Lease.
59% of their non-armored tactical vehicles (this category includes Jeeps, trucks, and half-tracks, but it's worth noting that the US sent more trucks than the Soviets total production in this category).
Food aid and petroleum products numbered in the millions of tons.
Then there's the almost 2000 locomotives provided (mostly steam, with less than a hundred diesel locomotives) and close to 10000 train cars to go with them.
I've seen some people make the specious argument that "The Soviets didn't like our weapons, so they got assigned to rear echelon roles where it didn't make a difference". This argument is, of course wrong, for a couple of reasons:
- Rear echelon roles are still vital - a Sherman in the rear frees up a T34 for the front.
- They likes several of our designs so much that they based designs of their own on them, or in some cases (such as the B-29) blatantly copied it in the post war era.
- Sheer numbers meant that entire units were armed with lend-lease weapons - and those units did see combat using those weapons.
- It of course completely ignores all the support vehicles, trains, food, and petroleum producs that were also a part of lend-lease.