To find out how many butterfly stickers Rachelle lost, you can subtract the number of stickers she has left from the number of stickers she originally had.
Original number of stickers = 428
Stickers left = 152
Stickers lost = Original number of stickers - Stickers left
Stickers lost = 428 - 152
Stickers lost = 276
So, Rachelle lost 276 butterfly stickers during her move.