Multiple choice general knowledge To make a number in cell C1 10% smaller than the number in C3 you enter =C3*1.10 +C3*110 =C3%10 =C3*.90 Reveal answer Fill a bubble to check yourself D Correct answer Explanation To make a number 10% smaller, multiply by 0.90 (which is 100% - 10%). This gives you 90% of the original value. Option A (=C3*1.10) would make it 10% larger, not smaller. Option C (=C3%10) is incorrect Excel syntax for percentage calculations.