Nope - 7/8 is greater
Here's a cool way to solve these types of problems
First write 5/6ths and 7/8ths on a sheet of paper. Then multiply the numbers that are across from each other. 8x5 and 7x6 are the numbers.
8x5=40
7x6=42
42 is greater than 40, and the numerator of the fraction used in the equation is the bigger fraction. 7 is the numerator of 7/8 which is bigger than 5/6.
