Which is bigger 7/8 or 3/4?

to compare fractions to see which is greater or lesser we need to bring the fractions to a common denominator.

the denominators of the 2 fractions , 7/8 and 3/4 are 8 and 4 respectively.
we can multiply both numerator and denominator of 3/4 by 2 to get --> 6/8.

then both 7/8 and 6/8 have same denominator and we can compare then. when denominator is same the bigger the numerator, greater the fraction is.
from 7/8 and 6/8,    7/8 is the larger fraction
answer is 7/8