If a investor wanted to combine 3/4 acre parcels with 1.6 acre partial how big will the partial be expressed as a decimal

To find the size of the combined parcel, you will convert the 3/4 to a decimal.

You can divide 3 and 4 to get 0.75 or you could create equivalent ratios with a denominator of 100.

3  =  75
4      100

This equals 0.75.

Now add 0.75 and 1.6

 1.60
+0.75
 2.35

The new parcel is 2.35 acres.

You didn’t tell us how you want to figure it out