Normally when the number is directly beside another number it indicates to multiply. So 3x4= 12 and 12 to the second power is 144. Its just a guess I’m not exactly sure if this is how to solve!
5/6-4/5=1/30
She uses 1/30 yard of lace for the jewel box.
.777777777777777
or
388888889/500000000
The answer is in the question. The question says he used 2/3 of it to make sandwiches. Unless your asking what 2/3 of 7/8 is then the answer would be 7/12.
you just multiply the top numbers together and the bottom numbers together and then reduce.