2x-1 and 7-6 out of 10 = 0.9

2x-1 and 7-6 out of 10 = 0.9

Grade 5 168 × 3 / 4 = 126
126×6/7=108
A: there are 108 students in Grade 6
Pear tree × (1-1 / 5) = apple tree
4200×(1-1/5)=3360
A: the apple tree is 3360 grams