In this KS2 Maths article you’ll learn how to round decimals to one decimal place. ... Remember, one hundredth is 0.01 and ten hundredths make one tenth which is 0.1.

Here, 4 hundredths is less than 5 hundredths, so it is rounded down. When it is rounded down, 7.54 becomes 7.5. Now, let's try rounding the number 7.56 to the nearest tenth.