The idea behind "Math for Grownups" by Laura Laing is a good one, but the execution is poor.
There are no figures in the book and yet the author is writing about everyday math. For example, she helps the reader construct a flower bed without any visual help.
Secondly, there are at least three major errors in the book. For example, on page 116, the author says, "If you divide 23 by 12, you'll end up with 2 1/12 cups", but 2 1/12 should be 1 11/12. On page 204, the formula for converting Celsius to Fahrenheit should be 9C/5 + 32, not 9/5(C+32).