CREATE TABLE table_204_358 (id NUMBER, "species" CLOB, "common name" CLOB, "ncbi accession #" CLOB, "ncbi name" CLOB, "length" CLOB, "sequence identity" CLOB, "sequence similarity" CLOB, "years since divergence from human  ( mya ) " NUMBER)

whats the percentage of difference between the frog and zebra fish ?
SELECT (SELECT "sequence identity" FROM table_204_358 WHERE "common name" = 'frog') - (SELECT "sequence identity" FROM table_204_358 WHERE "common name" = 'zebra fish')
SELECT (SELECT "sequence identity" FROM "table_204_358" WHERE "common name" = 'frog') - (SELECT "sequence identity" FROM "table_204_358" WHERE "common name" = 'zebra fish')