Please help!!
The topic is ratios and proportions.

Step-by-step explanation:

From the first set 20 corresponds to 1/6

for a fraction of 2/3 = 4/6

thus 4 * 1/6 = 4 * 20 = 80 calories

For 10 calories,

20 * 1/2 = 10 calories thus

1/6 * 1/2 = 1/12

For 90 calories,

10 * 9 = 90 calories thus,

1/12 * 9 = 9/12 = 3/4

step-by-step explanation: i dont