To convert the mixed number 7 20 into a decimal, you first need to convert it into an improper fraction. The whole number part is 7, and you can express this as a fraction with the same denominator as the fractional part, which is 20.
Now, to convert 7 into a fraction with a denominator of 20, multiply 7 by 20, which gives you 140. So, 7 can be expressed as 140/20.
Now, add the fractional part, which is 20/20 (this represents 1 as a fraction of itself). Thus:
140/20 + 20/20 = 160/20
Now, we simplify 160/20. Dividing the numerator and denominator by 20 gives:
160 ÷ 20 = 8 and 20 ÷ 20 = 1
So, the mixed number 7 20 is equal to 8, which is already a decimal.
To express this as a percent, simply multiply the decimal by 100.
8 × 100 = 800%
In summary, 7 20 as a decimal is 8 and as a percent, it is 800%.