Answer:
Lucy had 40 books last year.
Step-by-step explanation:
assuming 100% is the percent;
100% + 70%
100 : x
170 : 68
cross multiply = 170x = 100 x 68
-------- ————-
170 170
cancel 170/170
therefore x = 100 x 68 divided by 170
result is 40
Answer:
w = 10
Step-by-step explanation:
6w - 6 = 54
6w = 54 + 6
6w = 60
w = 60/6
w = 10
Answer:
4/15
Step-by-step explanation:
3/5x4/9=
12/45=
4/15
24 Red Pens
4 Black Pens
That means there is 28 pens in total. Of those 28 pens, 24 are red.
Our fraction would be 24/28 and then we need to simplify it to 6/7.
6/7 = 85.71%
Deena spent 45 minutes painting
Clara spent 30 more minutes than that= 75 minutes
Adam spent twice that= 150 minutes
45+75+150=270
They spent 270 minutes painting all together