(34.123+9.30)/(98.7654-5.108)

0.4636.

Explanation:

Hello!

In this case, when performing mathematical operations with number having different significant figures, we first resolve the problem without fixing the significant figures:

(34.123+9.30)/(98.7654-5.108) = 0.463637

However, the result should be shown with 4 significant figures due to the fact that the addition 34.123+9.30 is equal to 43.42 because the 9.30 is significant to the hundredths; therefore, the correct result is:

0.4636.

Best regards!