Answer:
22 1/8
Step-by-step explanation:
Ms. Lopez drew a 40 cm line and she erased 17 7/8cm.
erased = subtraction
40 - 17 7/8 =?
Add one as the denominator for 40.
40/1 - 17 7/8=?
Make the mixed fraction into a improper fraction.
8 x 17 = 136. 136 + 7 = 143. 143/
Find the LCD of 1 and 8, which is 8.
40/1 - 143/8 = 320/8 - 143/8= 177/8
Make 177/8 into a mixed fraction.
177/8 = 22 1/8
