Well let’s simplify the problem.
If we take one sandwich it would be 1: and if we add the fact that for every one sandwich 3 new sandwiches were made, we can make a 1:3 ratio. If for every 1 sandwich there are 3 more sandwiches then we would multiply the beginning amount of 20 sandwiches to both numbers in the ratio so it stays equivalent.
1 x 20 = 20
3 x 20 = 60
So we can say now that the ratio for 20 sandwich pieces there are 60 new sandwich pieces.
The new ratio being 20:60 thus the amount of sandwiches after they were cut in thirds is 60 sandwiches
Answer = 60 sandwiches
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Have a nice day! :D
