Find the lowest common denominator for the following fractions.

Find the quotient. 50a2 – 98b2 -5a +7b

Write the percent as a fraction or mixed number in simplest form. 0.8%

Answer asap. you begin with 1/2 scoop of ice cream. since you're hungry, you ask the vendor for 2/7 more scoops of ice cream. then, you eat 5/8 scoops. how many scoops of ice cream are left on your cone? i will mark brainliest for first correct answer.