Final answer:
Sandra used 2 eighths of a meter of string.
Step-by-step explanation:
To write the fraction of a meter Sandra used in eighths, we need to convert the fraction 1/4 of a meter to eighths. There are 8 eighths in a whole, so we can divide 1/4 by 1/8 to find the equivalent fraction in eighths. When dividing fractions, we multiply the dividend by the reciprocal of the divisor, so 1/4 divided by 1/8 is equal to (1/4) * (8/1) = 8/4 = 2 eighths.