Can you read English? The KJV in Exodus 12:40 does not say how long Israel dwelt in Egypt: it only says they sojourned 430 years. The NIV does not say Israel sojourned at all: it only says they lived in Egypt 430 years. This is wrong by 215 years, as the table shows. The NIV contradicts itself, because it has Israel in Egypt for 430 years (Ex 12:40), but has only 430 years from Abraham to Sinai (Gal 3:17).
A nonrestrictive clause is not essential to the sentence, so it is enclosed with commas. Exodus 12:40 in the KJV allows Abraham and his family to sojourn for 215 years before moving to Egypt, where their children dwelt another 215 years. The clause, “who dwelt in Egypt,” is enclosed in commas, so it is not essential to the sentence, and it has no relation to the 430 years. The NIV, by removing the commas and any reference to sojourning, requires Israel in Egypt for 430 years, contradicting Galatians 3:17! Commas are important! The NIV is wrong! And so are all other modern versions in Exodus 12:40!
Adjective clauses or phrases are nonrestrictive when they describe (rather than limit the meaning of) the noun or pronoun they modify: set off by commas, they are nonessential parenthetical elements that may be omitted.
Harbrace College Handbook, Tenth Edition, 1986.