4/5 of our numbers were already decimals so we only had to convert one fraction into a decimal number. In this case the fraction was 21/5 so what I did to change it was dividing 21 by 5 which equals 4.2. I did not need to use a calculator or right it down because I find it easier to do math in my head. I did not find this challenging and I did not need to use a number line or another strategy to convert the fraction.