### Become an OU student

The science of nutrition and healthy eating

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

# 3.3 Calculating RIs

In the next activity you will practise working out reference intake values.

## Activity 4 Calculating daily intake

Timing: Allow approximately 10 minutes.

a.

a) they are each 86% of the fat for the day

b.

b) the sandwiches contain just under 9% of the total fat and 10% of the saturated fat

c.

c) the sandwiches contain 10% of the total fat and 65% of the saturated fat

d.

d) the sandwiches contain 10% of the total fat and 30% of the saturated fat

d.

Correct: Because the RI for total fat is 70 g, and the sandwiches contain 7 g, then calculating 7/70 and multiplying by 100, shows that the sandwiches contain 10% of the total fat for the day.

The RI for saturated fat is 20 g and the sandwiches contain 6 g, so a similar calculation (6/20, multiply by 100) shows that the sandwiches contain 30% of the saturated fat for the day. You may find 5.3.2 Reference intake values useful.

a.

a) they could eat 4 bars and would consume close to the RI of fat for a day

b.

b) they could eat 5 bars and would consume just over the RI of fat for a day

c.

c) they could eat 7 bars and would consume slightly more than the RI of fat for a day

d.

d) they could eat 7 bars and would consume more than 50 g over the RI of fat for a day.