Lizzy: Jeff had 300 pencils and donated 30% of them. Vicki had twice as many pencils as Jeff and donated 3/4 of his pencils. How many pencils are there remaining altogether?.
Me: Hmmm, let me think. I think this is the detailed solution:
Jeff donated 30 / 100 * 300 = 90 pencils. He remained with 300 - 90 = 210 pencils. Vicki had twice as many pencils as Jeff, meaning he had 2 * 300 = 600 pencils. When Vicki donated 3 / 4 of his pencils, he gave away 3 / 4 * 600 = 450 pencils. Vicki remained with 600 - 450 = 150 pencils. Together, Jeff and Vicki remained with 150 + 210 = 360 pencils. Final answer: 360.