Answer:
20%
Step-by-step explanation:
The photo has a 7-inch length and 5-inch width and you have to reduce it into a 5.6-inch length and 4-inch width.
The percentage reduces for the length will be:
100% - (5.6 inch / 7 inch * 100%)= 20%
The percentage reduce for the width will be:
100% - (4 inch / 5 inch * 100%)= 20%
Then, the photo needs to be reduced by 20% in order to fit the allotted space.