so 90/7 divided by 1 and three-fourths i keep trying but i keep getting a different answer what would be the best estimate

see below

Step-by-step explanation:

90/7 : 1 3/4

Change to an improper fraction

90/7 : (4*1+3) / 4

90/7 : 7/4

Copy dot flip

90/7 * 4/7

360 / 49

The exact answer is 7 17/49

To estimate I would round 49 to 50 and 360 to 350

350/50 is approximately 7 and since I rounded the numerator down and the denominator up, the answer would be a little higher